Add a public custom sources example to the build docs
Add a public custom sources example to the build docs
Related to: https://gitlab.com/gitlab-org/omnibus-gitlab/issues/1625#note_16553899
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Add a public custom sources example to the build docs
Related to: https://gitlab.com/gitlab-org/omnibus-gitlab/issues/1625#note_16553899