Lets take a look at the architecture of the demo application:

  1. 1.products service: handles querying products from the database and returning them to the frontend
  2. 2.orders service: handles validating and creating orders
  3. 3.order history service: handles querying a customer's order history
  4. 4.payments service: handles processing orders for payment
  5. 5.api gateway: unifies the services under a single endpoint
  6. 6.mongodb/ postgresql: serves as the write-optimized database for storing orders, order history, products, etc.

You don't need to use MongoDB/ Postgresql as your write-optimized database in the demo application; you can use other prisma supported databases as well. This is just an example.