Docker: add latest major & latest minor tags

Currently, on the seafile harbor, you can only download latest and any specific version, like 10.0.4. Since I want to control my major updates and automate the minor ones it would be great to also tag the corresponding latest of each major as :9 or :10 (and possibly, although not needed for me, :10.0)


I second this.

With 11 Pro looming, I would like this too.