Docker Hub overview is a stale copy of README and links to a 404

Describe the bug

The overview shown on https://hub.docker.com/r/rustfs/rustfs is an old snapshot of README.md. It still links to https://docs.rustfs.com/introduction.html, which now returns 404.

The current README.md no longer contains that URL — it points to https://docs.rustfs.com/en/installation instead.

To Reproduce

1. Open https://hub.docker.com/r/rustfs/rustfs
2. Follow the documentation link in the overview
3. It lands on https://docs.rustfs.com/introduction.html → 404

Or from the API:

$ curl -s https://hub.docker.com/v2/repositories/rustfs/rustfs/ \
    | jq -r .full_description | grep -o 'https://docs\.rustfs\.com[^ )]*' | sort -u
https://docs.rustfs.com
https://docs.rustfs.com/
https://docs.rustfs.com/introduction.html

$ curl -s -o /dev/null -w '%{http_code}\n' -L https://docs.rustfs.com/introduction.html
404

Expected behavior

The Docker Hub overview reflects the current README.md, and its documentation links resolve.

Additional context

The two have drifted a long way apart:

Docker Hub's overview is not updated by docker push — it is a separate full_description field, written through the web UI or PATCH /v2/repositories/<namespace>/<repo>/. I could not find anything in this repository that writes it: .github/workflows/docker.yml uses docker/login-action and docker/build-push-action, neither of which touches the description, and searching the repo for dockerhub-description, full_description and hub.docker.com/v2 returns nothing. So it appears to be maintained by hand, which would explain the drift.

If keeping it in sync automatically sounds useful, a step like this in docker.yml would do it, and it needs no new secrets — DOCKERHUB_USERNAME and DOCKERHUB_TOKEN are already used by the Docker Hub login step:

- name: Sync Docker Hub description
  uses: peter-evans/dockerhub-description@v5.0.0
  with:
    username: ${{ env.DOCKERHUB_USERNAME }}
    password: ${{ secrets.DOCKERHUB_TOKEN }}
    repository: rustfs/rustfs
    readme-filepath: ./README.md

One caveat if you go that way: Docker Hub caps full_description at 25,000 characters, and README.md is at 22,879 today, so there is not much headroom left.

Happy to open a PR for this if it would be welcome.