Install Gitlab-CE in Docker on Ubuntu
Gitlab-CE (Community Edition) is a completely free and powerful web-based Git-repository manager with wiki, issue-tracking and CI/CD pipeline features, using an open-source license, developed by GitLab Inc. There're already many much better docs on the net, I've never worked with Docker and Linux before, so I wrote this post to save my way to install the Gitlab docker version on Ubuntu, the post is more or less for personal purpose.