⨯ Failed to start server
Error: listen EADDRINUSE: address already in use :::3020
    at <unknown> (Error: listen EADDRINUSE: address already in use :::3020)
    at new Promise (<anonymous>) {
  code: 'EADDRINUSE',
  errno: -4091,
  syscall: 'listen',
  address: '::',
  port: 3020
}