attempt to build arm64 images

Author: trashhalo

.github/workflows/publish.yml

@@ -19,6 +19,9 @@ jobs:
       - name: Create Docker context
         run: docker context create mycontext
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v1
@@ -49,6 +52,7 @@ jobs:
         with:
           context: .
           builder: ${{ steps.buildx.outputs.name }}
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ghcr.io/${{ steps.repo_name.outputs.repo }}:${{ steps.image_tag.outputs.tag }},ghcr.io/${{ steps.repo_name.outputs.repo }}:latest
           cache-from: type=local,src=/tmp/.buildx-cache