title: How do I modify the configuration of Yarn?
body: <p>In <code>npm</code> I can run</p>
  
  <pre><code>npm config set cafile "path/to/my/cert.pem"
  </code></pre>
  
  <p>Can you do something similar with Facebook's <code>yarn</code>?</p>
  
  <p>When I run <code>yarn -h</code>, I don't see any options for setting any kind of configuration.</p>
  
  <p>Am I missing something?</p>