ci: build Docker image on push

.github/workflows/docker-image.yml

@@ -0,0 +1,52 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ "master" ]
+
+env:
+  REGISTRY: ghcr.io
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Build project with Gradle
+      uses: gradle/[email protected]
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v2
+      with:
+        buildkitd-flags: --debug
+        config-inline: |
+          [worker.oci]
+            max-parallelism = 1
+            
+    - name: Log in to GitHub Container registry
+      uses: docker/login-action@v2
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Docker meta
+      id: meta
+      uses: docker/metadata-action@v4
+      with:
+        images: ${{ env.REGISTRY }}/${{ github.repository }}
+
+    - name: Build and push Image
+      id: push
+      uses: docker/build-push-action@v3
+      with:
+        context: .
+        file: Dockerfile
+        platforms: linux/amd64,linux/arm64
+        tags: ${{ steps.meta.outputs.tags }}
+        push: true
+        labels: ${{ steps.meta.outputs.labels }}