Add automated checks

[cabo]

E.g., see #32

[dicagno]

Is this still a to-do?
If so, could you please enumerate the required checks? Happy to integrate them in a pipeline (gh actions) and locally (git hooks?) 🙂

[cabo]

It's more of a "desirable", but we now should have the pieces in place to do this.
In particular @akeranen's results from the last Hackathon might fit into a CI process.

[akeranen]

Yes, part of this (schema errors) is covered by #72