renukaparmar03/minute_kart ? reverse-engineered prompt

Build me a simple shopping app called Minute Kart, with a clean frontend and a backend that supports it.

I want users to be able to browse products, open a product, add items to a cart, change quantities, remove items, and see the total update right away. It should feel fast and easy to use on both desktop and mobile. If it makes sense, include a simple checkout flow or order summary page, even if it is just a basic demo version.

Please make the app look polished, keep the code organized, and set it up so it can be deployed easily, since this repo already has separate Backend and Frontend folders and a Vercel config. If you need current docs for anything, look them up online and keep the implementation modern and practical.