Update docker-image.yml

Add a multi-platform docker image build

Author: dvlaskin

.github/workflows/docker-image.yml

@@ -26,6 +26,12 @@ jobs:
         with:
           dotnet-version: ${{ env.DOTNET_VERSION }}
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Log in to Docker Hub
         uses: docker/login-action@v3
         with:
@@ -42,26 +48,13 @@ jobs:
           fi
           echo "version=$VERSION" >> $GITHUB_OUTPUT
 
-      - name: Build Docker image
-        run: |
-          IMAGE=$DOCKER_USER/$APP_NAME
-          VERSION=${{ steps.vars.outputs.version }}
-
-          echo "Building $IMAGE:$VERSION" from $DOCKERFILE_PATH
-          docker build -t $IMAGE:$VERSION -f $DOCKERFILE_PATH .
-
-          # if this is a tag → push latest version as well
-          if [ "$VERSION" != "latest" ]; then
-            docker tag $IMAGE:$VERSION $IMAGE:latest
-          fi
-
-      - name: Push Docker image
-        run: |
-          IMAGE=$DOCKER_USER/$APP_NAME
-          VERSION=${{ steps.vars.outputs.version }}
-
-          docker push $IMAGE:$VERSION
-
-          if [ "$VERSION" != "latest" ]; then
-            docker push $IMAGE:latest
-          fi
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ${{ env.DOCKERFILE_PATH }}
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          push: true
+          tags: |
+            ${{ secrets.DOCKERHUB_USERNAME }}/${{ env.APP_NAME }}:${{ steps.vars.outputs.version }}
+            ${{ secrets.DOCKERHUB_USERNAME }}/${{ env.APP_NAME }}:latest