build: single platform and workflow dispatch for first release

Author: peterpeterparker

.github/workflows/publish.yaml

@@ -1,6 +1,7 @@
 name: Publish Docker image
 
 on:
+  workflow_dispatch:
   release:
     types: [published]
 
@@ -31,7 +32,7 @@ jobs:
         uses: docker/build-push-action@v3
         with:
           context: .
-          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          platforms: linux/amd64
           file: ./Dockerfile
           push: true
           tags: ${{ steps.meta.outputs.tags }}