Build a simple React App included Router and Validation User Signing (URL): https://task-management-by-m-hassaan.netlify.app/
you have to run the json-server first before you use the App cause no data storage in backend.
download the App in your local machine then open it in code editor then move on to server repo then run 'npm start' it will run in localhost 3004, then move back again to client repo and run the App 'npm start'.