fix CORS 에러 수정, credential은 와일드카드 CORS허용 불가

src/main/java/newCar/event_page/controller/AdminController.java

@@ -22,7 +22,7 @@
 @Tag(name = "admin API", description = "admin API 설계입니다")
 @RestController
 @RequestMapping("/admin")
-@CrossOrigin(origins = "*", allowCredentials = "true")
+@CrossOrigin(origins = {"https://www.batro.org", "http://localhost"}, allowCredentials = "true")
 public class AdminController {
 
     private final EventService eventService;