https://fosdem.org/2025/schedule/event/fosdem-2025-6839-ligh...
Also see main working page:
https://www.earth.org.uk/RSS-efficiency.html
I can point you to bits of config (it's a bit scattered in my blogs at the moment) like this:
https://www.earth.org.uk/note-on-site-technicals-83.html#202...