Create /data/shared-blobs and /data/uploads on startup
Don't require the operator to create them ahead of time.
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.
Don't require the operator to create them ahead of time.