Added support for arm64 Docker builds

Author: squidfunk

.github/workflows/publish.yml

@@ -63,6 +63,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
       - name: Login to DockerHub
         uses: docker/login-action@v1
         with:
@@ -80,6 +86,7 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           tags: |
             ${{ github.event.repository.full_name }}:latest
             ${{ github.event.repository.full_name }}:${{ github.event.release.tag_name }}