ci(docker): Optimize Docker build workflow and configuration

- Add environment variable for Docker registry image to reduce duplication
- Set job timeout to 60 minutes to prevent hanging builds
- Update docker/build-push-action from v5 to v6 for latest features
- Configure Docker Buildx with moby/buildkit:latest and host network
- Disable provenance attestation to improve build performance
- Replace hardcoded registry image reference with env variable for maintainability

Author: vastsa

.github/workflows/docker-image.yml

@@ -8,9 +8,13 @@ on:
     tags:
       - 'v*'
 
+env:
+  REGISTRY_IMAGE: ${{ secrets.DOCKER_USERNAME }}/filecodebox
+
 jobs:
   buildx:
     runs-on: ubuntu-latest
+    timeout-minutes: 60
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -21,7 +25,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ${{ secrets.DOCKER_USERNAME }}/filecodebox
+          images: ${{ env.REGISTRY_IMAGE }}
           tags: |
             type=ref,event=branch
             type=ref,event=pr
@@ -35,6 +39,10 @@ jobs:
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+        with:
+          driver-opts: |
+            image=moby/buildkit:latest
+            network=host
 
       - name: Login to DockerHub
         uses: docker/login-action@v3
@@ -43,7 +51,7 @@ jobs:
           password: ${{ secrets.DOCKER_PASSWORD }}
 
       - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64
@@ -52,3 +60,4 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+          provenance: false