ghcr test with caching

.github/workflows/docker_ci.yml

@@ -15,9 +15,6 @@ jobs:
 
     steps:
 
-      # - name: Checkout
-      #   uses: actions/checkout@v4
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -28,10 +25,6 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: check files
-        run: |
-          ls
-
       - name: Build and push
         uses: docker/build-push-action@v5
         env:
@@ -42,6 +35,8 @@ jobs:
           context: "{{defaultContext}}:backend"
           file: ./Dockerfile
           tags: ghcr.io/${{ github.repository }}/backend:v9.9.10
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
 
   # lint-backend-code:
   #   name: Lint and test backend python code