Booru notes...
me said:
I want to set up a booru, and I don't want to make something from scratch, but which one do I pick?!?
Shimmie2
([url=]source[/url])e621ng
(source)https://e621.net/wiki_pages/11244 said:
e621's source code is a heavily modified fork of the Danbooru code. It is a Ruby on Rails application. It has been made officially Open Source on March 5th 2020.
([url=]source[/url])
Gelbooru
Currently does not seem to be open source, and doesn't look too promising from this discussion on open sourcing it.