There is also somewhere a step to set up an alias for `occ` that ca be used outside the container to directly execute occ cli commands inside the container.

Set default_phone_region like this:
occ config:syste:set default_phone_region --value="DE"

Check if you have to alter this line in the _collabora/loolwsd.xml_ file:

`<host desc="Regex pattern of hostname to allow or deny." allow="true">nextcloud\\.sporada\\.eu</host>`