I installed GitLab CE using the Omnibus package on a new CentOS 6 server. Since I had nothing else on the server at that time, everything GitLab setup and configured was sufficient. Later, however, I wanted to setup additional sites on the server using Apache, but now port 80 was already bound to by GitLab’s built-in Nginx web server.
What I really wanted to do is disable the built-in Nginx server and just use my self-managed Apache installation. Here’s how to do just that.