Initialization config has bizarre defaults

[abeforgit]

I understand (now) that each app likely needs to override these, but that's not quite clear from the docs.
Additionally, the default settings are specific to LMB/GN and don't seem widely applicable.

If there can be no sensible default, it's better to crash the service when no config is given.

[abeforgit]

Hmm it does seem we were mounting a config file rather than the whole config dir, which is probably not the right approach in the first place. Still, couldn't hurt to be a bit more clear