title: Symfony 4, CORS and OPTION requests
body: <ul>
  <li>Just started a new project with Symfony 4 as API and Vue as frontend/app. </li>
  <li>Vue started complaining about CORS, so I started sending the required CORS headers (<code>Access-Control-Allow-Origin</code>).</li>
  <li>Then it started saying 'Response for preflight does not have HTTP ok status.'.</li>
  </ul>
  
  <p>I hacked my API for now to force the status code to always be 200, but I'm looking for a long-term solution. Why is my API–built with Symfony 4–not respond with an OK status? </p>