add gitlab-ci.yml to be able to push release images
In order to create the release tags, also included shell script for this purporse
Bug: T329678
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.
In order to create the release tags, also included shell script for this purporse
Bug: T329678