This commit
* adds a new docs page (`dockerhub.md`) that contains Docker Hub README
* updates the default config that gets backed into the docker image
* updates CI with a new workflow job that keeps Docker Hub README in
sync with the contents of the `docs/dockerhub.md` file
Co-authored-by: CrazyMax <github@crazymax.dev>
Signed-off-by: Milos Gajdos <milosthegajdos@gmail.com>