diff --git a/.gitignore b/.gitignore
index 9154f4c..c2065bc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,26 +1,37 @@
-# ---> Java
-# Compiled class file
-*.class
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
 
-# Log file
-*.log
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
 
-# BlueJ files
-*.ctxt
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
 
-# Mobile Tools for Java (J2ME)
-.mtj.tmp/
-
-# Package Files #
-*.jar
-*.war
-*.nar
-*.ear
-*.zip
-*.tar.gz
-*.rar
-
-# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
-hs_err_pid*
-replay_pid*
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
 
+### VS Code ###
+.vscode/
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..50664e6
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,9 @@
+FROM openjdk:21
+
+WORKDIR /app
+
+COPY . /app
+
+COPY wait-for-it.sh /usr/local/bin/
+RUN chmod +x /usr/local/bin/wait-for-it.sh
+RUN microdnf install findutils
\ No newline at end of file
diff --git a/README.md b/README.md
index 9db6d99..e69de29 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +0,0 @@
-# InternerProgramming
-
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..a048eca
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,28 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.2.3'
+	id 'io.spring.dependency-management' version '1.1.4'
+}
+
+group = 'com.example'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	sourceCompatibility = '21'
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web:3.2.3'
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa:3.2.3'
+	implementation 'org.postgresql:postgresql:42.7.2'
+	implementation 'org.springdoc:springdoc-openapi-starter-webmvc-ui:2.3.0'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
diff --git a/compose.yaml b/compose.yaml
new file mode 100644
index 0000000..82aa607
--- /dev/null
+++ b/compose.yaml
@@ -0,0 +1,41 @@
+version: '3.8'
+services:
+  db:
+    image: postgres:16
+    environment:
+      - POSTGRES_USER=postgres
+      - POSTGRES_PASSWORD=postgres
+      - POSTGRES_DB=onlineshop
+    volumes:
+      - pgdbdata:/var/lib/postgresql/data/
+    ports:
+      - "5432:5432"
+    networks:
+      - main_network
+  spring:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    volumes:
+      - ./:/app
+    environment:
+      POSTGRES_URL: jdbc:postgresql://db:5432/onlineshop
+      POSTGRES_USERNAME: postgres
+      POSTGRES_PASSWORD: postgres
+    links:
+      - db:db
+    depends_on:
+      - db
+    networks:
+      - main_network
+    command: ["bash", "run_backend.sh"]
+    ports:
+      - "8080:8080"
+
+
+networks:
+  main_network:
+    driver: bridge
+
+volumes:
+  pgdbdata: null
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..d64cd49
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..1af9e09
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..1aa94a4
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..6689b85
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/run_backend.sh b/run_backend.sh
new file mode 100644
index 0000000..e9b8f23
--- /dev/null
+++ b/run_backend.sh
@@ -0,0 +1,2 @@
+/usr/local/bin/wait-for-it.sh db:5432 -t 15
+bash gradlew bootRun
\ No newline at end of file
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..51f7a8f
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'onlineshop'
diff --git a/src/main/java/com/example/onlineshop/OnlineshopApplication.java b/src/main/java/com/example/onlineshop/OnlineshopApplication.java
new file mode 100644
index 0000000..590484a
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/OnlineshopApplication.java
@@ -0,0 +1,14 @@
+package com.example.onlineshop;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+
+@SpringBootApplication
+public class OnlineshopApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(OnlineshopApplication.class, args);
+	}
+
+}
diff --git a/src/main/java/com/example/onlineshop/config/AppStartup.java b/src/main/java/com/example/onlineshop/config/AppStartup.java
new file mode 100644
index 0000000..0c53e9f
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/config/AppStartup.java
@@ -0,0 +1,21 @@
+package com.example.onlineshop.config;
+
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.context.event.EventListener;
+import org.springframework.stereotype.Component;
+
+import com.example.onlineshop.service.DataInit;
+
+@Component
+public class AppStartup {
+    private final DataInit dataInit;
+
+    public AppStartup(DataInit dataInit) {
+        this.dataInit = dataInit;
+    }
+
+    @EventListener(ApplicationReadyEvent.class)
+    public void onApplicationReadyEvent() {
+        dataInit.initData();
+    }
+}
diff --git a/src/main/java/com/example/onlineshop/controllers/ProductController.java b/src/main/java/com/example/onlineshop/controllers/ProductController.java
new file mode 100644
index 0000000..89c28d7
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/controllers/ProductController.java
@@ -0,0 +1,41 @@
+package com.example.onlineshop.controllers;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+import com.example.onlineshop.models.Product;
+import com.example.onlineshop.service.ProductService;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/product")
+public class ProductController {
+    @Autowired
+    private ProductService productService;
+
+    @GetMapping
+    public List<Product> getAllProducts() {
+        return productService.getAllProducts();
+    }
+
+    @GetMapping("/{id}")
+    public Product getProductById(@PathVariable Long id) {
+        return productService.getProductById(id);
+    }
+
+    @PostMapping
+    public Product createProduct(@RequestBody Product product) {
+        return productService.createProduct(product);
+    }
+
+    @PutMapping("/{id}")
+    public Product updateProduct(@PathVariable Long id, @RequestBody Product product) {
+        return productService.updateProduct(id, product);
+    }
+
+    @DeleteMapping("/{id}")
+    public void deleteProduct(@PathVariable Long id) {
+        productService.deleteProduct(id);
+    }
+}
diff --git a/src/main/java/com/example/onlineshop/models/Category.java b/src/main/java/com/example/onlineshop/models/Category.java
new file mode 100644
index 0000000..7061e4b
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/models/Category.java
@@ -0,0 +1,45 @@
+package com.example.onlineshop.models;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Column;
+
+@Entity
+public class Category {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(unique = true, nullable = false)
+    private String name;
+
+    public Category() {}
+
+    public Category (Long id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public void setId(Long id){
+        this.id = id;
+    }
+
+    public Long getId(){
+        return this.id;
+    }
+
+    public void setName(String name){
+        this.name = name;
+    }
+
+    public String getName(){
+        return this.name;
+    }
+
+    @Override
+    public String toString(){
+        return "Category: id=" + this.id + ", name=" + this.name;
+    }
+}
diff --git a/src/main/java/com/example/onlineshop/models/Product.java b/src/main/java/com/example/onlineshop/models/Product.java
new file mode 100644
index 0000000..df56b9b
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/models/Product.java
@@ -0,0 +1,109 @@
+package com.example.onlineshop.models;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.Column;
+
+@Entity
+public class Product {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(unique = true, nullable = false)
+    private String name;
+
+    @Column(nullable = false)
+    private double price;
+
+    @ManyToOne
+    @JoinColumn(name = "category_id", nullable = false)
+    private Category category;
+
+    @Column(nullable = false, columnDefinition = "TEXT")
+    private String info;
+
+    @ManyToOne
+    @JoinColumn(name = "size_id", nullable = false)
+    private Size size;
+
+    @Column(columnDefinition = "TEXT")
+    private String photo;
+
+    public Product() {}
+
+    public Product(Long id, String name, double price, Category category, String info, Size size, String photo){
+        this.id = id;
+        this.name = name;
+        this.price = price;
+        this.category = category;
+        this.info = info;
+        this.size = size;
+        this.photo = photo;
+    }
+
+    public void setId(Long id){
+        this.id = id;
+    }
+
+    public Long getId(){
+        return this.id;
+    }
+
+    public void setName(String name){
+        this.name = name;
+    }
+
+    public String getName(){
+        return this.name;
+    }
+
+    public void setPrice(double price){
+        this.price = price;
+    }
+
+    public double getPrice(){
+        return this.price;
+    }
+
+    public Category getCategory(){
+        return this.category;
+    }
+
+    public void setCategory(Category category){
+        this.category = category;
+    }
+
+    public void setInfo(String info){
+        this.info = info;
+    }
+
+    public String getInfo(){
+        return this.info;
+    }
+
+    public Size getSize(){
+        return this.size;
+    }
+
+    public void setSize(Size size){
+        this.size = size;
+    }
+
+    public String getPhoto(){
+        return this.photo;
+    }
+
+    public void setPhoto(String photo){
+        this.photo = photo;
+    }
+
+    @Override
+    public String toString(){
+        return "Product: id=" + this.id + ", name=" + this.name;
+    }
+}
diff --git a/src/main/java/com/example/onlineshop/models/Size.java b/src/main/java/com/example/onlineshop/models/Size.java
new file mode 100644
index 0000000..c2a25e5
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/models/Size.java
@@ -0,0 +1,45 @@
+package com.example.onlineshop.models;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Column;
+
+@Entity
+public class Size {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(unique = true, nullable = false)
+    private String name;
+
+    public Size(){}
+
+    public Size (Long id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public void setId(Long id){
+        this.id = id;
+    }
+
+    public Long getId(){
+        return this.id;
+    }
+
+    public void setName(String name){
+        this.name = name;
+    }
+
+    public String getName(){
+        return this.name;
+    }
+
+    @Override
+    public String toString(){
+        return "Size: id=" + this.id + ", name=" + this.name;
+    }
+}
diff --git a/src/main/java/com/example/onlineshop/repository/CategoryRepository.java b/src/main/java/com/example/onlineshop/repository/CategoryRepository.java
new file mode 100644
index 0000000..eefad56
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/repository/CategoryRepository.java
@@ -0,0 +1,8 @@
+package com.example.onlineshop.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import com.example.onlineshop.models.Category;
+
+public interface CategoryRepository extends JpaRepository<Category, Long> {
+    
+}
diff --git a/src/main/java/com/example/onlineshop/repository/ProductRepository.java b/src/main/java/com/example/onlineshop/repository/ProductRepository.java
new file mode 100644
index 0000000..8446fb3
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/repository/ProductRepository.java
@@ -0,0 +1,8 @@
+package com.example.onlineshop.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import com.example.onlineshop.models.Product;
+
+public interface ProductRepository extends JpaRepository<Product, Long> {
+    
+}
diff --git a/src/main/java/com/example/onlineshop/repository/SizeRepository.java b/src/main/java/com/example/onlineshop/repository/SizeRepository.java
new file mode 100644
index 0000000..c4779aa
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/repository/SizeRepository.java
@@ -0,0 +1,8 @@
+package com.example.onlineshop.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import com.example.onlineshop.models.Size;
+
+public interface SizeRepository extends JpaRepository<Size, Long> {
+    
+}
diff --git a/src/main/java/com/example/onlineshop/service/DataInit.java b/src/main/java/com/example/onlineshop/service/DataInit.java
new file mode 100644
index 0000000..cc2ab5f
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/service/DataInit.java
@@ -0,0 +1,44 @@
+package com.example.onlineshop.service;
+
+import org.springframework.stereotype.Service;
+
+import com.example.onlineshop.models.Category;
+import com.example.onlineshop.models.Size;
+import com.example.onlineshop.repository.CategoryRepository;
+import com.example.onlineshop.repository.SizeRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class DataInit {
+    private final CategoryRepository categoryRepository;
+    private final SizeRepository sizeRepository;
+
+    public DataInit(CategoryRepository categoryRepository, SizeRepository sizeRepository) {
+        this.categoryRepository = categoryRepository;
+        this.sizeRepository = sizeRepository;
+    }
+
+    public void initData() {
+        if (categoryRepository.count() == 0) {
+            String[] categoryArray = {"Футболки", "Шорты", "Штаны", "Кроссовки", "Куртки"};
+            
+            for (String category : categoryArray){
+                Category tmpCategory = new Category();
+                tmpCategory.setName(category);
+                categoryRepository.save(tmpCategory);
+            }
+        }
+
+        if (sizeRepository.count() == 0){
+            String[] sizeArray = {"S", "M", "L", "XS", "XL"};
+            
+            for (String size : sizeArray){
+                Size tmpSize = new Size();
+                tmpSize.setName(size);
+                sizeRepository.save(tmpSize);
+            }
+        }
+    }
+}
diff --git a/src/main/java/com/example/onlineshop/service/ProductService.java b/src/main/java/com/example/onlineshop/service/ProductService.java
new file mode 100644
index 0000000..7a2a584
--- /dev/null
+++ b/src/main/java/com/example/onlineshop/service/ProductService.java
@@ -0,0 +1,43 @@
+package com.example.onlineshop.service;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import com.example.onlineshop.models.Product;
+import com.example.onlineshop.repository.ProductRepository;
+
+import java.util.List;
+
+@Service
+public class ProductService {
+    @Autowired
+    private ProductRepository productRepository;
+
+    public List<Product> getAllProducts() {
+        return productRepository.findAll();
+    }
+
+    public Product getProductById(Long id) {
+        return productRepository.findById(id)
+                .orElseThrow(() -> new RuntimeException("Product not found with id: " + id));
+    }
+
+    public Product createProduct(Product product) {
+        return productRepository.save(product);
+    }
+
+    public Product updateProduct(Long id, Product product) {
+        if (!productRepository.existsById(id)) {
+            throw new RuntimeException("Product not found with id: " + id);
+        }
+        product.setId(id);
+        return productRepository.save(product);
+    }
+
+    public void deleteProduct(Long id) {
+        if (!productRepository.existsById(id)) {
+            throw new RuntimeException("Product not found with id: " + id);
+        }
+        productRepository.deleteById(id);
+    }
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
new file mode 100644
index 0000000..e099bfe
--- /dev/null
+++ b/src/main/resources/application.properties
@@ -0,0 +1,9 @@
+spring:
+  docker:
+    compose:
+      file: "./compose.yml"
+spring.datasource.url=${POSTGRES_URL}
+spring.datasource.username=${POSTGRES_USERNAME}
+spring.datasource.password=${POSTGRES_PASSWORD}
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
+spring.jpa.generate-ddl=true
\ No newline at end of file
diff --git a/src/test/java/com/example/onlineshop/OnlineshopApplicationTests.java b/src/test/java/com/example/onlineshop/OnlineshopApplicationTests.java
new file mode 100644
index 0000000..f3be847
--- /dev/null
+++ b/src/test/java/com/example/onlineshop/OnlineshopApplicationTests.java
@@ -0,0 +1,13 @@
+package com.example.onlineshop;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class OnlineshopApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}
diff --git a/target/classes/com/example/onlineshop/OnlineshopApplication.class b/target/classes/com/example/onlineshop/OnlineshopApplication.class
new file mode 100644
index 0000000..8ae2cca
Binary files /dev/null and b/target/classes/com/example/onlineshop/OnlineshopApplication.class differ
diff --git a/target/test-classes/com/example/onlineshop/OnlineshopApplicationTests.class b/target/test-classes/com/example/onlineshop/OnlineshopApplicationTests.class
new file mode 100644
index 0000000..e718cc1
Binary files /dev/null and b/target/test-classes/com/example/onlineshop/OnlineshopApplicationTests.class differ
diff --git a/wait-for-it.sh b/wait-for-it.sh
new file mode 100755
index 0000000..3974640
--- /dev/null
+++ b/wait-for-it.sh
@@ -0,0 +1,182 @@
+#!/usr/bin/env bash
+# Use this script to test if a given TCP host/port are available
+
+WAITFORIT_cmdname=${0##*/}
+
+echoerr() { if [[ $WAITFORIT_QUIET -ne 1 ]]; then echo "$@" 1>&2; fi }
+
+usage()
+{
+    cat << USAGE >&2
+Usage:
+    $WAITFORIT_cmdname host:port [-s] [-t timeout] [-- command args]
+    -h HOST | --host=HOST       Host or IP under test
+    -p PORT | --port=PORT       TCP port under test
+                                Alternatively, you specify the host and port as host:port
+    -s | --strict               Only execute subcommand if the test succeeds
+    -q | --quiet                Don't output any status messages
+    -t TIMEOUT | --timeout=TIMEOUT
+                                Timeout in seconds, zero for no timeout
+    -- COMMAND ARGS             Execute command with args after the test finishes
+USAGE
+    exit 1
+}
+
+wait_for()
+{
+    if [[ $WAITFORIT_TIMEOUT -gt 0 ]]; then
+        echoerr "$WAITFORIT_cmdname: waiting $WAITFORIT_TIMEOUT seconds for $WAITFORIT_HOST:$WAITFORIT_PORT"
+    else
+        echoerr "$WAITFORIT_cmdname: waiting for $WAITFORIT_HOST:$WAITFORIT_PORT without a timeout"
+    fi
+    WAITFORIT_start_ts=$(date +%s)
+    while :
+    do
+        if [[ $WAITFORIT_ISBUSY -eq 1 ]]; then
+            nc -z $WAITFORIT_HOST $WAITFORIT_PORT
+            WAITFORIT_result=$?
+        else
+            (echo -n > /dev/tcp/$WAITFORIT_HOST/$WAITFORIT_PORT) >/dev/null 2>&1
+            WAITFORIT_result=$?
+        fi
+        if [[ $WAITFORIT_result -eq 0 ]]; then
+            WAITFORIT_end_ts=$(date +%s)
+            echoerr "$WAITFORIT_cmdname: $WAITFORIT_HOST:$WAITFORIT_PORT is available after $((WAITFORIT_end_ts - WAITFORIT_start_ts)) seconds"
+            break
+        fi
+        sleep 1
+    done
+    return $WAITFORIT_result
+}
+
+wait_for_wrapper()
+{
+    # In order to support SIGINT during timeout: http://unix.stackexchange.com/a/57692
+    if [[ $WAITFORIT_QUIET -eq 1 ]]; then
+        timeout $WAITFORIT_BUSYTIMEFLAG $WAITFORIT_TIMEOUT $0 --quiet --child --host=$WAITFORIT_HOST --port=$WAITFORIT_PORT --timeout=$WAITFORIT_TIMEOUT &
+    else
+        timeout $WAITFORIT_BUSYTIMEFLAG $WAITFORIT_TIMEOUT $0 --child --host=$WAITFORIT_HOST --port=$WAITFORIT_PORT --timeout=$WAITFORIT_TIMEOUT &
+    fi
+    WAITFORIT_PID=$!
+    trap "kill -INT -$WAITFORIT_PID" INT
+    wait $WAITFORIT_PID
+    WAITFORIT_RESULT=$?
+    if [[ $WAITFORIT_RESULT -ne 0 ]]; then
+        echoerr "$WAITFORIT_cmdname: timeout occurred after waiting $WAITFORIT_TIMEOUT seconds for $WAITFORIT_HOST:$WAITFORIT_PORT"
+    fi
+    return $WAITFORIT_RESULT
+}
+
+# process arguments
+while [[ $# -gt 0 ]]
+do
+    case "$1" in
+        *:* )
+        WAITFORIT_hostport=(${1//:/ })
+        WAITFORIT_HOST=${WAITFORIT_hostport[0]}
+        WAITFORIT_PORT=${WAITFORIT_hostport[1]}
+        shift 1
+        ;;
+        --child)
+        WAITFORIT_CHILD=1
+        shift 1
+        ;;
+        -q | --quiet)
+        WAITFORIT_QUIET=1
+        shift 1
+        ;;
+        -s | --strict)
+        WAITFORIT_STRICT=1
+        shift 1
+        ;;
+        -h)
+        WAITFORIT_HOST="$2"
+        if [[ $WAITFORIT_HOST == "" ]]; then break; fi
+        shift 2
+        ;;
+        --host=*)
+        WAITFORIT_HOST="${1#*=}"
+        shift 1
+        ;;
+        -p)
+        WAITFORIT_PORT="$2"
+        if [[ $WAITFORIT_PORT == "" ]]; then break; fi
+        shift 2
+        ;;
+        --port=*)
+        WAITFORIT_PORT="${1#*=}"
+        shift 1
+        ;;
+        -t)
+        WAITFORIT_TIMEOUT="$2"
+        if [[ $WAITFORIT_TIMEOUT == "" ]]; then break; fi
+        shift 2
+        ;;
+        --timeout=*)
+        WAITFORIT_TIMEOUT="${1#*=}"
+        shift 1
+        ;;
+        --)
+        shift
+        WAITFORIT_CLI=("$@")
+        break
+        ;;
+        --help)
+        usage
+        ;;
+        *)
+        echoerr "Unknown argument: $1"
+        usage
+        ;;
+    esac
+done
+
+if [[ "$WAITFORIT_HOST" == "" || "$WAITFORIT_PORT" == "" ]]; then
+    echoerr "Error: you need to provide a host and port to test."
+    usage
+fi
+
+WAITFORIT_TIMEOUT=${WAITFORIT_TIMEOUT:-15}
+WAITFORIT_STRICT=${WAITFORIT_STRICT:-0}
+WAITFORIT_CHILD=${WAITFORIT_CHILD:-0}
+WAITFORIT_QUIET=${WAITFORIT_QUIET:-0}
+
+# Check to see if timeout is from busybox?
+WAITFORIT_TIMEOUT_PATH=$(type -p timeout)
+WAITFORIT_TIMEOUT_PATH=$(realpath $WAITFORIT_TIMEOUT_PATH 2>/dev/null || readlink -f $WAITFORIT_TIMEOUT_PATH)
+
+WAITFORIT_BUSYTIMEFLAG=""
+if [[ $WAITFORIT_TIMEOUT_PATH =~ "busybox" ]]; then
+    WAITFORIT_ISBUSY=1
+    # Check if busybox timeout uses -t flag
+    # (recent Alpine versions don't support -t anymore)
+    if timeout &>/dev/stdout | grep -q -e '-t '; then
+        WAITFORIT_BUSYTIMEFLAG="-t"
+    fi
+else
+    WAITFORIT_ISBUSY=0
+fi
+
+if [[ $WAITFORIT_CHILD -gt 0 ]]; then
+    wait_for
+    WAITFORIT_RESULT=$?
+    exit $WAITFORIT_RESULT
+else
+    if [[ $WAITFORIT_TIMEOUT -gt 0 ]]; then
+        wait_for_wrapper
+        WAITFORIT_RESULT=$?
+    else
+        wait_for
+        WAITFORIT_RESULT=$?
+    fi
+fi
+
+if [[ $WAITFORIT_CLI != "" ]]; then
+    if [[ $WAITFORIT_RESULT -ne 0 && $WAITFORIT_STRICT -eq 1 ]]; then
+        echoerr "$WAITFORIT_cmdname: strict mode, refusing to execute subprocess"
+        exit $WAITFORIT_RESULT
+    fi
+    exec "${WAITFORIT_CLI[@]}"
+else
+    exit $WAITFORIT_RESULT
+fi
\ No newline at end of file