Some site updates

We’re in the process of upgrading to Debian 11 (bullseye). If you come across any issues, feel free to raise them on the -social IRC channel on oftc (also accessible via Matrix) and we’ll look into it as soon as we have a chance.

We’re aware that live streaming isn’t currently working on our PeerTube instance, we have had some issues with this relatively new feature before, although at the moment we seem to be affected by upstream issue #4390.