suman-george/mern-stack-chat-app ? reverse-engineered prompt

Build me a simple real time chat app where people can sign up or log in, join the app, and send messages back and forth in a clean modern interface.

I want a working full stack app with a separate frontend and backend, and I’d like it to feel like a real product, not just a demo. Make it easy to create an account, see who is online if that fits naturally, start a conversation, and keep the chat updated without refreshing the page. Please set up the whole thing so I can run it locally and test it right away.

Use sensible defaults, keep the UI straightforward and friendly, and make sure the code is organized clearly. If you need to check current docs or best practices while building it, go ahead and look them up online.