> why is there an sql server running on alpha?
No idea. I removed them again when I set up alpha+beta. It's also marked as auto-installed:
```
$ apt list --installed *postgres*
Listing... Done
postgresql-12/focal-updates,focal-security,now 12.4-0ubuntu0.20.04.1 amd64 [installed,automatic]
postgresql-client-12/focal-updates,focal-security,now 12.4-0ubuntu0.20.04.1 amd64 [installed,automatic]
postgresql-client-common/focal-updates,focal-security,now 214ubuntu0.1 all [installed,automatic]
postgresql-client/focal-updates,focal-security,now 12+214ubuntu0.1 all [installed]
postgresql-common/focal-updates,focal-security,now 214ubuntu0.1 all [installed,automatic]
```