sourceravi77/Doctor-Appointment-Booking-System_MERN-STACK ? reverse-engineered prompt

Build me a doctor appointment booking app where patients can sign up, log in, see a list of doctors, check their available time slots, and book or cancel appointments بسهولة.

I also want a simple doctor side where doctors can see upcoming bookings and update their availability, plus an admin view to manage doctors and appointments. Make it feel clean and easy to use on both desktop and mobile.

Set up the full app with a working frontend and backend, connected to a database, with basic authentication and role based access so users only see what they should. Add the usual things like form validation, success and error messages, and a nice dashboard for each type of user. If you need to, look up the current docs online for anything unclear and then build it in a way that is easy to run locally.