build for amd64, arm64

Author: bennettgoble

.github/workflows/ci.yaml

@@ -43,6 +43,7 @@ jobs:
 
       - name: Login to Docker Hub
         uses: docker/login-action@v3
+        if: startsWith(github.ref, 'refs/tags/v')
         with:
           username: ${{ secrets.SHARED_DOCKERHUB_USER }}
           password: ${{ secrets.SHARED_DOCKERHUB_TOKEN }}
@@ -54,4 +55,5 @@ jobs:
           push: ${{ startsWith(github.ref, 'refs/tags/v') }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/amd64,linux/arm64