title: ReactJS (create-react-app) run on port 80
body: <p>Can somebody explain how to run my reactJS app on port 80, without specifying port</p>
  
  <p>currently it works on   www.mydomain.com:3001 but I want it to be visible when I go to www.mydomain.com</p>
  
  <p>I can't find the solution on create-react-app docs website so I'm asking here.</p>
  
  <p>If I run application with </p>
  
  <pre><code>sudo npm start
  </code></pre>
  
  <p>I get error that something is already using port 80 (I did specify PORT= 80)</p>
  
  <p>Thanks</p>