Add Ci image build and publish
This change adds a .gitlab-ci.yml using kokkuri to build and publish the blubber image.
It seems the blubber config should stay in the .pipeline folder (similar to old pipeline lib).
Bug: T300171
How to register an account on GitLab. To prevent spam, new accounts are locked until approved by an admin or the approver bot. You can also file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
This change adds a .gitlab-ci.yml using kokkuri to build and publish the blubber image.
It seems the blubber config should stay in the .pipeline folder (similar to old pipeline lib).
Bug: T300171