Publish the docker image

[jkremser]

It would be nice to have the up to date docker image in the docker hub so that user don't have to clone the repo and build it... the online version didn't work for me, because I have a lot or repos under my profile

[tipsy]

(besides the point, but your profile seems to work: https://github-profile-summary.com/user/Jiri-Kremser)