chore: use the local intermediate image for test

.github/workflows/docker-test.yml

@@ -25,19 +25,13 @@ jobs:
       -
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
-      -
-        name: Login to DockerHub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
       -
         name: Build and push
         uses: docker/build-push-action@v5
         with:
           context: '.'
           file: './Dockerfile'
-          push: true
+          load: true
           tags: ttionya/vaultwarden-backup:dev
       -
         name: Build test Docker image
@@ -45,6 +39,7 @@ jobs:
         with:
           context: '.'
           file: './tests/Dockerfile'
+          build-contexts: ttionya/vaultwarden-backup:dev=docker-image://ttionya/vaultwarden-backup:dev
           tags: ttionya/vaultwarden-backup:test
           load: true
       -