wolverine9087/shopinsta- ? reverse-engineered prompt

Build me a full ecommerce web app called ShopInsta that feels like shopping through Instagram Reels.

I want customers to be able to browse products, search by category or keyword, save favorites, add things to a cart, and place Cash on Delivery orders. I also want sellers to have their own account where they can create a shop, add products, upload short promo videos for products, and manage stock and orders. Please include login and registration, role based access for customer and seller, and make sure the app looks good on mobile, tablet, and desktop.

Use a modern React frontend with a clean, responsive UI, and a Node and Express backend with MongoDB for storing users, products, reels, carts, and orders. Add secure JWT auth with cookies, image and video upload support, and basic validation for forms and requests. If needed, look up current docs online and make sensible choices for the setup. I’d like the whole thing ready to run locally with env files and a simple deploy path too.