CreateDB creates a new DB instance based on the configuration.

OrdersCollection is the name of the MongoDB collection to use for Orders.

ShipmentCollection is the name of the MongoDB collection to use for Shipment data.

MongoDB is a struct that implements the DB interface for MongoDB.

OrderStatus is a struct that represents the status of an Order.

ShipmentStatus is a struct that represents the status of a Shipment.

SQLiteDB is a struct that implements the DB interface for SQLite.

DB is an interface that defines the methods that a database driver must implement.