The doc says

Make sure you have both docker and docker-compose(>=1.24.0) installed. On Ubuntu, just run apt install docker-compose docker.io.

and I have,

$ docker-compose -v
docker-compose version 1.25.0, build unknown

However, I don’t have docker.io, because

The following packages have unmet dependencies:
 containerd.io : Conflicts: containerd
                 Conflicts: runc
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

I am a bit wary about uninstalling containerd and runc, because I have a few other docker containers running on the VPS and I don’t want to break them. What is the difference between docker.io and the regular docker package? Is it why docker-compose throws an error?

Do we know if it is really used infrequently, or does it just happen that it is not used during the events pictured on screen? There is no dialog where a character claims that it is used infrequently?

Go by the prophets, Child

We know from the Morn episode that it can remain liquid for quite some time too.

Interesting but is it really more frequent than any other number in the script?