Some changes

src/main/java/np/something/controllers/GreetingController.java

@@ -6,7 +6,7 @@ import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 public class GreetingController {
-    @GetMapping
+    @GetMapping("/greet")
     public String greeting(@RequestParam(value = "name", defaultValue = "world") String name) {
         return "Hello, " + name + "!";
     }