Самохостинг Discourse стал намного проще

[NateDhaliwal]

IIRC Raspberry Pis can already host Discourse:

Discourse on a Raspberry Pi | Blog

A long standing feature request from our community is finally here! As of today, you are able to host a complete Discourse instance in a $35 Raspberry Pi. You can go ahead and follow our official install guide, and it will work out of the box in any recent Raspberry Pi model. This is a companion discussion topic for the original entry at https://blog.discourse.org/2021/12/2021-12-07-discourse-on-a-raspberry-pi/

Discourse on a Pi 5

Discourse