Simplify CI

.forgejo/workflows/docker.yaml

@@ -27,16 +27,17 @@ jobs:
           apk add --no-cache git nodejs
 
       - name: "Login to Docker repository"
-        id: login
-        run: docker login -u "$GITHUB_ACTOR" -p "${{ secrets.PACKAGE_TOKEN }}" "$DOCKER_REPOSITORY"
+        uses: https://github.com/docker/login-action@v3
+        with:
+          registry: "$DOCKER_REPOSITORY"
+          username: "$GITHUB_ACTOR"
+          password: "${{ secrets.PACKAGE_TOKEN }}"
 
-      - name: "Get repo"
-        uses: https://code.forgejo.org/actions/checkout@v4
-
-      - name: "Build Docker image"
-        id: build
-        run: docker buildx build --pull --platform linux/amd64 -t "$DOCKER_TAG" .
-
-      - name: "Publish Docker image"
-        id: push
-        run: docker push "$DOCKER_TAG"
+      - name: "Build and push"
+        use: https://github.com/docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: "$DOCKER_TAG"
+          cache-from: type=gha
+          cache-to: type=gha,mode=max