fix: ELB 헬스 체크

src/main/java/com/sideProject/PlanIT/domain/health/HealthController.java

@@ -0,0 +1,17 @@
+package com.sideProject.PlanIT.domain.health;
+
+import com.sideProject.PlanIT.common.response.ApiResponse;
+import com.sideProject.PlanIT.common.response.CustomException;
+import com.sideProject.PlanIT.common.response.ErrorCode;
+import com.sideProject.PlanIT.domain.post.dto.request.BannerRequestDto;
+import jakarta.validation.Valid;
+import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+public class HealthController {
+    @GetMapping("")
+    public ApiResponse<String> healthCheck() {
+        return ApiResponse.ok("서버가 정상적으로 동작 중 입니다.");
+    }
+}