Merge requests are a place to propose changes you've made to a project and discuss those changes with others
Interested parties can even contribute by pushing commits if they want to.
Regarding current problems with the container registry pushing and deleting from and to the container registry is not working, and we are working on fixing this. As a current alternative, we can offer our Harbor instance, which can be reached at https://hub.cc-asp.fraunhofer.de.