use apline from docker-registry.wikimedia.org
This change uses alpine from docker-registry.wikimedia.org. Old alpine image is not present on list of allowed images.
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 uses alpine from docker-registry.wikimedia.org. Old alpine image is not present on list of allowed images.