Consider adding some CI (GHA) to have the mock server continuously tested

[stronk7]

It would be great if we can get the mock server covered with tests.

The can be proper/pure unit tests, not requiring the server to be running and accepting requests. But also can have some integration tests, with the server launched and various requests (postman style) verifying that everything is working as expected. Or, more specifically, it can also be a Moodle instance, configured to to use a mock instance and running Moodle's phpunit/behat tests.

There is a world of opportunities, let's pick a strategy and try to get the mock server continuously verified.

Ciao :-)