I will respond even though this post is several days old because I actually do this. I have some vpses on Hetzner that run Silverblue no problem. It is not an install option available by default there, but support uploaded an iso under my account quickly when asked.

If you do it, change the active firewalld zone. The default is for a desktop, so not great for vps space.

Hmm, docs.conduit.rs appears to be an alias for famedly.gitlab.io. I copied the link from the intro in the README.md file in the GiLab repository.

Here is the Conduit Docker deployment guide.

https://famedly.gitlab.io/conduit/deploying/docker.html

I started with the Docker Compose file they provide, and "translated" it into Podman rootless containers for my server. Even with adding the extra work, it was pretty painless.

Agreed on Hetzner, although I have used customer support—to add another distro option. Sent them a web link, and they had it uploaded under my account by the next day.

Yep, except with http here (python3 -m uploadserver).

There is also Rocket.chat, to complete the list, though it is supposed to be difficult to host.

I would recommend Matrix. My small instance is running Conduit, and it works great!