Loading
Change clickhouse's module conf directory to permit overrides
The module already creates the file `/etc/clickhouse-server/config.xml`.
If the service uses this file for config, it permits to override the conf like this:
```nix
environment.etc."clickhouse-server/config.d/logging.xml".text = ''
<clickhouse>
<logger>
<level>notice</level>
<logger>
</clickhouse>
'';
```