.github/workflows/deploy.yml: docker push for main branch (#79)

Author: joelanford

.github/workflows/deploy.yml

@@ -88,5 +88,5 @@ jobs:
       with:
         context: .
         platforms: linux/amd64,linux/arm64,linux/ppc64le,linux/s390x
-        push: ${{ (github.event_name != 'pull_request' && startsWith(github.ref, 'refs/tags/')) }}
+        push: ${{ (github.event_name != 'pull_request' && (startsWith(github.ref, 'refs/tags/') || github.ref == 'refs/heads/main')) }}
         tags: ${{ steps.prep.outputs.tags }}