add baseline generic CDN setup
In order to improve privacy once ECH is in place, it would be good to have more websites shared on F-Droid's servers (which are like a little CDN). In the future could offer to front a handful of closely related low traffic sites like calyxos.org, postmarketos, codeberg, divestos, etc.
For now, the fronters should have the baseline CDN setup:
- its own neutral domain name (fdroid.net? freeyourandroid.net? private-sphere.net? something else cheap?)
- separate certbot certs per-domain
Edited by Hans-Christoph Steiner