title: Use single expo codebase for multiple apps
body: <p>I got an application what we white-label for others.
  This means we share the same functionality through the apps but there are some specific design elements (mostly colors and pictures) in each app.</p>
  
  <p>I'm looking for the easiest and best way to identify the built app for my Expo React Native codebase.</p>
  
  <p>My plan is store everything in the same javascript codebase, and just get load the correct config files by the application name.</p>
  
  <p>In this case, I would get a few apps in the stores:</p>
  
  <ul>
  <li>BlueApp</li>
  <li>RedApp</li>
  <li>GreenApp</li>
  </ul>
  
  <p>All of them would load the same expo <code>app: exp.host/@comp/colours</code>
  And this expo app should set the background to blue in the BlueApp and red in the RedApp.</p>
  
  <p>! I don't want to detach my expo app, I want to still build my apps with the expo.</p>