...The backend uses Node.js and Express to expose RESTful endpoints for products, users, orders, and payments, with MongoDB handling persistence and indexing. Authentication uses JWT and protected routes, while role-based guards separate shopper and admin flows such as product management and order fulfillment. The React frontend implements routing, global state, cart logic, checkout steps, reviews, search, and pagination so learners see a complete UX from browse to purchase. The codebase also walks through image uploads, third-party payment integration, and environment configuration suited for deployment. It’s designed as a reference you can extend—swap UI libraries, add coupons, connect different gateways, or move to a containerized deployment—without losing the core architecture.