surajkumaryadav9749/neo-ecommerce-app ? reverse-engineered prompt

Build me a full ecommerce web app where people can sign up, log in, browse products by category, add items to a cart, and place orders. I want a clean customer facing store, plus the ability to manage products and categories from the backend.

The app should have user authentication with secure login, a smooth shopping flow, order tracking basics, and payment checkout with Razorpay. Make sure the frontend and backend work together properly, with a React app for the UI and a Node, Express, MongoDB API behind it.

Please set it up so it feels like a real store, with product listings, product detail pages, cart updates, order creation, and a simple admin style area for managing inventory. If you need to check current docs or implementation details while building it, feel free to look them up online.