Small react & express fullstackapp, uses socket.io for data transport

live demo

_{^{small color bug from exporting to gif}}

• install dependencies at /backend & /frontend
• backend (def: http://localhost:4000)
  • http://localhost:3000 is already in cors
  • npm run start or watch (in its directory)
• frontend (def: http://localhost:3000)
  • add .env file with REACT_APP_BACKENDURL
  • npm run start (in its directory)