Scalable E-Commerce Platform

Build a scalable e-commerce platform using microservices architecture and Docker. The platform will handle various aspects of an online store, such as product catalog management, user authentication, shopping cart, payment processing, and order management. Each of these features will be implemented as separate microservices, allowing for independent development, deployment, and scaling.

1. **User Service:** Handles user registration, authentication, and profile management.
2. **Product Catalog Service:** Manages product listings, categories, and inventory.
3. **Shopping Cart Service:** Manages users' shopping carts, including adding/removing items and updating quantities.
4. **Order Service:** Processes orders, including placing orders, tracking order status, and managing order history.
5. **Payment Service:** Handles payment processing, integrating with external payment gateways (e.g., Stripe, PayPal).
6. **Notification Service:** Sends email and SMS notifications for various events (e.g., order confirmation, shipping updates). You can use third-party services like Twilio or SendGrid for this purpose.