How do i install mybb on a deep web forum?

It's not some kind of fucked up forums or some shit.It's just a torrent forum like rutracker.
How can i setup mybb on any forum software for deep web?

First of all you need hosting on deep web, there is few dark web pages for it but you have to look up it your self. Personally I don't go there...

Nginx with php-fpm over a unix-socket since you want PHP.
Host on a dedicated machine but create a virtualized instance.
Make sure the virtual instance doesn't know your WAN IP and can only be accessed through Tor.