[INFRA] Setting : 임시 배포 backend github action 설정오류 수정

.github/workflows/action.yml

@@ -44,7 +44,18 @@ jobs:
           echo "${{ secrets.APP_PROPERTIES_PROD }}" >> backend/src/main/resources/application-prod.properties
           echo "${{ secrets.APP_PROPERTIES }}" >> backend/src/main/resources/application.properties
 
-          
+      - name: Set up JDK 11
+        uses: actions/setup-java@v2
+        with:
+          java-version: '11'
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x backend/gradlew
+
+      - name: Build with Gradle
+        run: ./gradlew build
+        working-directory: backend
+
       - name: Log in to Docker Hub
         uses: docker/login-action@v1
         with: