Prior to this fix, every master commits was released to Dockerhub under latest
tag and tagged commit was released with a version tag in Dockerhub.
'Latest' tag in dockerhub should reference the latest released version and not
the head of master branch.
Thus, after this fix, 'latest' tag references the latest released version of
Authelia and 'master' tag references the head of master git branch.
Clement Michaud