The URI of TUHH Docker Registry changed from "docker.rz.tu-harburg.de:5000" to "docker.rz.tu-harburg.de". Please update your gitlab-ci.yml files if you use images from this registry.

Tags give the ability to mark specific points in history as being important
Repository has no tags yet.
Use git tag command to add a new one:
git tag -a v1.4 -m 'version 1.4'