Build a real-time chat application

• Users can send messages and see them appear in the chat in real time (for example, in a different browser tab)
• Users must submit a username to join
• Users can see the entire message history after joining the chat
• You must use node.js, react; the rest of the stack is up to you

• Multiple chat rooms
• Persistent message history
• Typescript
• File attachments

We pre-installed some packages and added a few configs so you don't have to spend your time on it:

• express server
• socket.io with a working config
• basic react app
• webpack proxy config to prevent CORS errors
• typescript config for the server
• typescript, ts-node, nodemon installed

• Build incrementally
• Avoid spending too much time on setup and tooling

• How you prioritize work considering the time limitation
• Tidiness, code structure and following best practices
• Your choice and usage of frameworks, libraries and tooling