This exercise is intentionally left open ended. Within you will find a skeleton code base and a json file intended to simulate a database.

• API listing all customers
• API retrieving a customer
• API listing all orders
• API listing all orders for a given date
• API retrieving an order
• API listing products
• API retrieving a product
• API list a customer's orders
• API saving a customer
• API saving a product
• Create Unit Tests to exercise the above

Implement the above listed requirements in a manner you see fitting. Demonstrate design and implementation aspects you feel are important in a software project.