The prerelease Docker workflow now also re-points the floating `prerelease` tag at each new RC manifest. Testers can pin `image: localdeepresearch/local-deep-research:prerelease` in their compose file and run `docker compose pull && docker compose up -d` to fetch the latest RC without editing the tag each cycle. Versioned tags (`prerelease-vX.Y.Z-<sha>`) are still published for reproducible testing.
