Before cloning please read https://medium.com/@ceofred/real-time-chat-app-with-socket-io-react-hooks-and-express-eca3c894feb, as it was created for it solely to clearify some certain things while using useEffect and socket.io
npm i --g concurrently
git clone https://www.github.com/ceofred/react-socket-hooks chat-app && cd chat-app
cd client && npm install
cd server && npm install
npm start