use docker action

.gitea/workflows/deploy.yaml

@@ -12,12 +12,13 @@ jobs:
         uses: actions/checkout@v4
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
-      - name: Build Docker Image
-        run: docker buildx build -t ${{ vars.DOCKER_TAG }} .
       - name: Log in to Docker Hub
         uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
-      - name: Push Docker image
-        run: docker push ${{ vars.DOCKER_TAG }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: ${{vars.DOCKER_TAG}}