env 파일 생성 디버깅 코드 추가

Author: goodjunseon

.github/workflows/deploy.yml

@@ -23,6 +23,9 @@ jobs:
       - name: Create .env files
         run: echo "${{ secrets.ENV_FILE_CONTENT }}" > backend/.env
 
+      - name: Check .env exists
+        run: cat backend/.env
+
       - name: Build Spring Boot App
         run: ./gradlew clean build -x test
         working-directory: backend