OutputUsage is a generic function to output a list of available environment vars based on the given config struct.

PersisterTypeFromName returns the correct persisterType from the string name.

PopulateFromDotEnv attempts to retrieve env vars from .env files to populate into the environment.

PersisterTypeInvalid is an invalid persister value.

PersisterTypeNone is a persister that does nothing but return default values.

PersisterTypePostgresql is a persister that uses PostgreSQL as the backend.

PersisterNameToType maps valid persister names to the types above.

PersisterConfig defines the interfaces for persister-related configuration.

PersisterType is the type of persister to use.