title: CORS error on localhost, Is that a normal?
body: <p>I am running a node.js API on port 8000 which is connected locally to mongo db. </p>
  
  <p>I then start my react server on port 3000 and straight away in console I get the error:</p>
  
  <p>Access to XMLHttpRequest at '<a href="http://localhost:8000/api/hero/" rel="noreferrer">http://localhost:8000/api/hero/</a>' from origin '<a href="http://localhost:3000" rel="noreferrer">http://localhost:3000</a>' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.</p>
  
  <p>Is this normal for a localhost setup?</p>