[FEATURE] Update Firebase config system APIs

[shurwit]

Is your feature request related to a problem? Please describe.
Currently we do not have a way to set the Firebase configurations without direct database access. In general, we should avoid requiring direct database manipulation at any point.

Describe the solution you'd like
We should create APIs to allow system admins to perform the necessary configurations of these Firebase configs. We should also ensure that the service starts successfully without any of these set up so the system admin can use these APIs the first time the service is launched.

Originally posted by @shurwit in #91 (comment)