feat:로그인 정보확인

Author: taeho4523

.github/workflows/gradle.yml

@@ -54,6 +54,8 @@ jobs:
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Verify login
+        run: docker info
 
       - name: Push Docker image
         run: |