wmf/ci: Provide build environment and gitlab-ci.yml
Build and publish an image following merges to wmf branch.
Bug: T319694
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.
Build and publish an image following merges to wmf branch.
Bug: T319694