title: React: dial tcp 127.0.0.1:3000: connect: connection refused
body: <p>I have just started with react and once I ran npm start for the first time, it gave me this issue.</p>
  
  <p>Going through a few of the answers, I found one which mentioned to allow the use of port 3000 i.e. unblocks it by firewall. But no luck yet.</p>