https://about.gitlab.com/better-than-github/ ; https://github.com/WebEntity/Installation-guide-for-GitLab-o... ; https://github.com/gitlabhq/gitlabhq/blob/8-0-stable/doc/ins... ; https://about.gitlab.com/downloads/
It's basically most of the features of GitHub; if you want the rest of GitLab's features you'll have to set them up yourself.
Still, it's hard to beat free and lightweight.
Besides that it is a lot less resource hungry.
Ok, of course I'm opinionated as a Drone plugins maintainer and former Gitea owner :P
Most compilers I'm aware of gets compiled by themselves. I think it's great for two things:
1) Show how serious the compiler is - compiler code tends to be complicated 2) Free real life testing
I was expecting Gitea to be hosted on Gitea for the same reasons. Was trying to offer criticism but got downvoted immediately, ahh HN =)