refator: cd healthy check api 추가

src/main/java/com/splanet/splanet/core/controller/StatusCheckController.java

@@ -0,0 +1,15 @@
+package com.splanet.splanet.core.controller;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class StatusCheckController {
+
+  @GetMapping("/health-check")
+  public ResponseEntity<Void> checkHealthStatus() {
+    return new ResponseEntity<>(HttpStatus.OK);
+  }
+}