title: Http request error with codeSandBox (React/Node)
body: <p>I have strange error in online IDE like CodeSandBox/StackBlitz.
  I do a sample http request (with axios but with fetch or others the problem is the same) and try to print the response in the console. 
  I use React for the front and node (listen port 8080) for the back,
  I precise that work when I do exactly the same with create react app, using npm start (localhost:3000 and http request in <code>http://[public ip]:8080/coucou</code>)</p>
  
  <p>react code here (request is in the Main.js file): 
  <a href="https://codesandbox.io/s/ww28ry45pl" rel="nofollow noreferrer">https://codesandbox.io/s/ww28ry45pl</a></p>
  
  <p>When I just put <code>http://[public ip]:8080/coucou</code> that work to and I have the good response from server.</p>
  
  <p>Here the error returned by server in codeSandBox (captured by the catch bloc) : </p>
  
  <blockquote>
    <p>Error {stack:
    "createError@<a href="https://ww28ry45pl.codesandbox.io/node_modules/axios/lib/core/createError.js:16:15" rel="nofollow noreferrer">https://ww28ry45pl.codesandbox.io/node_modules/axios/lib/core/createError.js:16:15</a>
    handleError@<a href="https://ww28ry45pl.codesandbox.io/node_modules/axios/lib/adapters/xhr.js:87:14" rel="nofollow noreferrer">https://ww28ry45pl.codesandbox.io/node_modules/axios/lib/adapters/xhr.js:87:14</a>
    "}</p>
  </blockquote>
  
  <p>I haven't found anything about this problem.</p>