Being able to functionaly utilize the same GH Docker action can be
beneficial for users wanting to build, test and develop in their own
repos. To do so, use ${{ github.repository_owner }} in the action. That
should provide some rudimentary flexibility without breaking the
canonical repo.
Users of this functionality should take care to populate the required
secrets in Github
* DOCKERHUB_TOKEN, DOCKERHUB_USERNAME
* CR_PAT