Override configuration guide shows how users can override configuration with global $config variable, for example by using settings.php file (the same method as for D7).
But is it possible to override the configuration in a similar way but with yml file? It’s much more convenient to use yml instead of php to override settings.
A real life example: let’s say my module offers some configuration but I don’t want to expose it via UI. I only want users to be able to change the settings via yml files (there are reasons for that). Obviously they shouldn’t change my modules yml config file. Can they create a new yml file, name it accordingly (how?) and put inside sites dir?
