Update to use buildx multiarch builds

Author: patrickdk77

.github/workflows/docker-image.yml

@@ -11,22 +11,33 @@ env:
 
 jobs:
 
-  build:
+  buildx:
 
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
+    - name: qemu setup
+      uses: docker/setup-qemu-action@v2
+
+    - name: docker buildx
+      uses: docker/setup-buildx-action@v2
+      with:
+        config-inline: |
+          [worker.oci]
+            max-parallelism = 2
+
     - name: docker login
-      env:
-        DOCKER_USER: ${{ env.DOCKER_USER }}
-        DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
-      run: |
-        docker login -u $DOCKER_USER -p $DOCKER_PASSWORD
-        
-    - name: docker build
-      run: docker build . --file Dockerfile --tag ${{ env.DOCKER_USER }}/${{ env.DOCKER_REPO }}:latest
-      
-    - name: docker push
-      run: docker push ${{ env.DOCKER_USER }}/${{ env.DOCKER_REPO }}:latest
+      uses: docker/login-action@v2
+      with:
+        username: ${{ env.DOCKER_USER }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+
+    - name: Build and Push
+      uses: docker/build-push-action@v3
+      with:
+        context: .
+        platforms: linux/amd64,linux/arm64,linux/arm/v7
+        push: true
+        tags: ${{ env.DOCKER_USER }}/${{ env.DOCKER_REPO }}:latest