I've updated our #Tor and #I2P federation docs:

https://codeberg.org/silverpill/mitra/src/branch/main/docs/onion.md
https://codeberg.org/silverpill/mitra/src/branch/main/docs/i2p.md

- Added missing description of I2P-only setup.
- Explained the difference between two operation modes (darknet-only vs clearnet + darknet).

The configuration is simple, especially for clearnet + darknet combo. My server federates with Tor and I2P instances - and that's just two lines in the configuration file.

If you are concerned about illegal content, you can use federation filter to proxy all media from .onion and .i2p domains, or to block all of them by default and allow only selected ones.