The default Config without an environment: the exact values loadConfig derives from
an empty env, with any knobs in overrides applied on top (mergeConfig semantics). For
tests and the in-memory quickstart that want a Config in hand without assembling an EnvMap.
The default Config without an environment: the exact values loadConfig derives from an empty env, with any knobs in
overridesapplied on top (mergeConfig semantics). For tests and the in-memory quickstart that want a Config in hand without assembling an EnvMap.