serverok.pl is a Fediverse instance that uses the ActivityPub protocol. In other words, users at this host can communicate with people that use software like Mastodon, Pleroma, Friendica, etc. all around the world.
This server runs the snac software and there is no automatic sign-up process.
I'm so glad that I'm able to use @nextcloud with #Collabora now that I'm running #Pangolin (https://github.com/fosrl/pangolin) instead of #Cloudflare tunnels
(yes I know there's a way of getting it working with CF tunnels, but I never managed it)
Nextcloud is much more useful to me now with in-browser document editing!