feat: swagger test를 위한 api 생성

.gitignore

@@ -36,5 +36,4 @@ out/
 ### VS Code ###
 .vscode/
 
-.env
 application.yml

src/main/java/com/umc/networkingService/domain/test/controller/TestController.java

@@ -1,17 +1,35 @@
 package com.umc.networkingService.domain.test.controller;
 
+import io.swagger.v3.oas.annotations.Hidden;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.tags.Tag;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
+@Tag(name = "예제 API", description = "Swagger 테스트용 API")
 @RestController
 @RequiredArgsConstructor
 @RequestMapping("/test")
 public class TestController {
+    @Operation(summary = "문자열 반복", description = "파라미터로 받은 문자열을 2번 반복합니다.")
+    @Parameter(name = "str", description = "2번 반복할 문자열")
+    @GetMapping("/returnStr")
+    public String returnStr(@RequestParam String str) {
+        return str + "\n" + str;
+    }
+
+    @GetMapping("/example")
+    public String example() {
+        return "예시 API";
+    }
 
-    @GetMapping
-    public String getTest() {
-        return "kimjunseok";
+    @Hidden
+    @GetMapping("/ignore")
+    public String ignore() {
+        return "무시되는 API";
     }
-}
+}