tushar2madaan/mern-ecommerce ? reverse-engineered prompt

Build me a full ecommerce app where shoppers can browse categories, products, and brands, sign in, add items to cart, and place orders. It should also have a seller area where merchants can manage their own brand and products, plus an admin dashboard that lets me control the whole store, including users, products, and categories.

I want the app to feel like a real modern store, with a clean React frontend and a Node and Express backend connected to MongoDB. Use Redux for app state and handle async actions properly. Set it up so it can run locally with Docker, and include a simple seed flow that creates an admin user from the command line. If you need to check current docs for anything, look them up online. Make sure the project is easy to start with one install command and has the usual env files for both client and server.