title: How to add option in <redoc>?
body: <p>I want to add some additional option to my ReDoc. For current implementation I am using json file that is generated from Swagger, and this is added in html page. Example how this is done:</p>
  
  <pre><code>  &lt;body&gt;
      &lt;redoc spec-url='http://petstore.swagger.io/v2/swagger.json'&gt;&lt;/redoc&gt;
      &lt;script src="https://cdn.jsdelivr.net/npm/redoc@next/bundles/redoc.standalone.js"&gt; &lt;/script&gt;
    &lt;/body&gt;
  </code></pre>
  
  <p>I use this as referent documentation: <a href="https://github.com/Rebilly/ReDoc" rel="nofollow noreferrer">https://github.com/Rebilly/ReDoc</a></p>
  
  <p>How can I add option object in  tag and not use ReDoc object? And how can I use vendor extension e.g. x-logo?
  In documentation this is set via json file, but my json file is auto generate from Swagger.</p>