refactor: Bun by default

src/app.ts

@@ -7,7 +7,8 @@ import authchecker from "./middlewares/authchecker";
 import { ErrorHandler } from './middlewares/ErrorHandler';
 import UserChecker from './middlewares/UserChecker';
 
-const CONTROLLERS_FILE_EXTENSION = process.env.NODE_ENV === 'production' ? 'js' : 'ts';
+// Always use .js when running from dist/ (Bun workflow: always build first)
+const CONTROLLERS_FILE_EXTENSION = 'js';
 const app = createExpressServer({
   authorizationChecker: authchecker,
   currentUserChecker: UserChecker,