Push the same images (same tag set: :latest rolling main, :stable/:X.Y.Z releases, :sha-) to docker.io/palashdeb/omnivoice-studio alongside GHCR. Gated on DOCKERHUB_USERNAME/DOCKERHUB_TOKEN secrets — without them the build still publishes to GHCR only. Docs-sync: docker.md mirror note. Requires repo secrets: DOCKERHUB_USERNAME, DOCKERHUB_TOKEN. Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>