Mention "Repository mirror" during Project Import
Problem
In #8 (closed) we've documented how to setup a repository mirror for an existing project: See https://gitlab.com/gitlab-org/status-page#how-to-set-up-repository-mirroring.
Users could skip this extra step if they use the "Mirror Repository" feature during the Project import from repo by URL. They simple tick [x] Mirror repository
:
Proposed solution
Describe this shortcut in the README as well.
Trivia
I failed to find documentation on [x] Mirror repository
when importing a project on https://docs.gitlab.com/
All I found was https://docs.gitlab.com/ee/user/project/import/repo_by_url.html (no "Mirror repository" mentioned) or https://docs.gitlab.com/ee/user/project/repository/repository_mirroring.html (no "Project import" mentioned).
@aqualls Welp