feat: create image for "linux/amd64" and "linux/arm64/v8" during development, to make it testable on MacOS

Author: TimPietrusky

.github/workflows/dev.yml

@@ -49,6 +49,7 @@ jobs:
           push: true
           tags: |
             ${{ secrets.DOCKERHUB_REPO }}/${{ secrets.DOCKERHUB_IMG }}:dev
+          platforms: linux/amd64,linux/arm64/v8