adding arm v7 build

.github/workflows/publish.yml

@@ -80,7 +80,7 @@ jobs:
         with:
           context: .
           file: ./release.dockerfile
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
           push: true
           tags: ${{ steps.prep.outputs.tags }}