• implement db schemas, microservice file structure, and plan the preparation for coding for both order-service and portfolio-service. Check implement structure of trading and portfolio microservices #18
• implement logic once done structure (hard part)

info:

• order-service is an order management system. It accepts orders, validates price via stock-service, and publishes events.
• portfolio-service is the user portfolio manager. It listens to trade events to update cash balances and stock holdings.