diff --git a/labs/.DS_Store b/labs/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/labs/.DS_Store differ
diff --git a/labs/lab_3/example_1.cs b/labs/lab_3/example_1.cs
new file mode 100644
index 0000000..5e35792
--- /dev/null
+++ b/labs/lab_3/example_1.cs
@@ -0,0 +1,76 @@
+List<TaskEntity> tasks = new()
+{
+    new TaskEntity() { Uuid= Guid.NewGuid(), Subject = "Сдать третью лабу", IsCompleted = false },
+};
+
+var builder = WebApplication.CreateBuilder(args);
+var app = builder.Build();
+
+// Массив сущностей.
+app.MapGet("/", () =>
+{
+    return tasks.Select(t => new TaskEntityDto()
+    {
+        Uuid = t.Uuid,
+        Subject = t.Subject,
+        IsCompleted = t.IsCompleted,
+    });
+});
+
+// Подробности сущности.
+app.MapGet("/{uuid}", (Guid uuid) =>
+{
+    var task = tasks.FirstOrDefault(t => t.Uuid == uuid);
+    if (task == null)
+        return Results.NotFound();
+    return Results.Json(new TaskEntityDto()
+    {
+        Uuid = task.Uuid,
+        Subject = task.Subject,
+        IsCompleted = task.IsCompleted,
+    });
+});
+
+// Создание сущности.
+app.MapPost("/", () => { throw new NotImplementedException(); });
+
+// Изменение сущности.
+app.MapPut("/{uuid}", () => { throw new NotImplementedException(); });
+
+// Удаление сущности.
+app.MapPost("/", () => { throw new NotImplementedException(); });
+
+app.Run();
+
+/// <summary>
+/// Сама сущность.
+/// </summary>
+public class TaskEntity
+{
+    public Guid Uuid { get; set; }
+    public string Subject { get; set; } = string.Empty;
+    public bool IsCompleted { get; set; }
+}
+
+/// <summary>
+/// DTO-класс для описания сущности в API.
+/// </summary>
+public class TaskEntityDto : TaskEntity { }
+
+/// <summary>
+/// Запрос на создание сущности.
+/// </summary>
+public class TaskCreateRequest
+{
+    public string Subject { get; set; } = string.Empty;
+    public bool IsCompleted { get; set; }
+}
+
+/// <summary>
+/// Запрос на изменение сущности.
+/// </summary>
+public class TaskEditRequest
+{
+    public string Subject { get; set; } = string.Empty;
+    public bool IsCompleted { get; set; }
+}
diff --git a/labs/lab_3/example_2.cs b/labs/lab_3/example_2.cs
new file mode 100644
index 0000000..1de87e7
--- /dev/null
+++ b/labs/lab_3/example_2.cs
@@ -0,0 +1,26 @@
+var builder = WebApplication.CreateBuilder(args);
+builder.Services.AddHttpClient(); // Добавляем библиотеку по работе с HTTP.
+var app = builder.Build();
+
+// Да, по заданию надо будет запрашивать метод /{uuid}. Тут запрашивается список.
+app.MapGet("/", async (IHttpClientFactory httpClientFactory) =>
+{
+    var remoteHost = "http://localhost:5158"; // Адрес, по которому развёрнут микросервис с задачами. В docker compose тут будет имя service.
+    var client = httpClientFactory.CreateClient();
+    var response = await client.GetFromJsonAsync<List<TaskEntityDto>>(remoteHost);
+    if (response == null)
+        return Results.BadRequest();
+    return Results.Ok($"Соседний микросервис отдал следующие задачи: {string.Join(", ", response.Select(i => i.Subject))}");
+});
+
+app.Run();
+
+/// <summary>
+/// DTO-класс для описания сущности из другого микросервиса.
+/// </summary>
+public class TaskEntityDto
+{
+    public Guid Uuid { get; set; }
+    public string Subject { get; set; } = string.Empty;
+    public bool IsCompleted { get; set; }
+}
diff --git a/labs/lab_3/example_nginx.conf b/labs/lab_3/example_nginx.conf
new file mode 100644
index 0000000..9d3e2b3
--- /dev/null
+++ b/labs/lab_3/example_nginx.conf
@@ -0,0 +1,21 @@
+server {
+    listen      80;
+    listen      [::]:80;
+    server_name localhost;
+
+    location /test/ {
+        proxy_pass       http://test:80/;
+        proxy_set_header Host      $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Prefix /test;
+    }
+
+    location /admin/ {
+        proxy_pass       http://admin:80/;
+        proxy_set_header Host      $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Prefix /admin;
+    }
+}