Update github action to use docker action as well as build for arm64

.github/workflows/build.yaml

@@ -15,26 +15,23 @@ jobs:
       packages: write
       contents: read
     steps:
-    - name: Checkout
-      uses: actions/checkout@v3
+      - name: Checkout
+        uses: actions/checkout@v3
 
-    - name: Build swarm image
-      run: |
-        docker build . \
-          --build-arg JSWARM_UID=48435 \
-          --build-arg JSWARM_GID=202 \
-          --tag $CONTAINER_NAME \
-          --label "runnumber=${GITHUB_RUN_ID}"
-    - name: Log in to GitHub Container Registry
-      run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u $ --password-stdin
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
 
-    - name: Push images
-      run: |
-        CONTAINER_ID=ghcr.io/${{ github.repository_owner }}/$CONTAINER_NAME
-        VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
-        [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
-        [ "$VERSION" == "master" ] && VERSION=latest
-        echo CONTAINER_ID=$CONTAINER_ID
-        echo VERSION=$VERSION
-        docker tag $CONTAINER_NAME $CONTAINER_ID:$VERSION
-        docker push $CONTAINER_ID:$VERSION
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ghcr.io/${{ github.repository }}:${{ [github.ref_name = "master"] && echo "latest" ||echo "merge" }}
+          build-args: JSWARM_UID=48435,JSWARM_GID=202
+          labels: runnumber=${{ GITHUB_RUN_ID }}