Build multi arch images (#5)

Author: Robsta86

.github/workflows/docker-publish.yml

@@ -70,6 +70,7 @@ jobs:
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}
+          platforms: linux/amd64,linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha