title: How do I specify an environment variable while building an Android App Bundle
body: <p>It looks like App Bundle is the preferred way of doing things (over APK) so I'd like to try to use it.</p>
  
  <p>I need some way to specify an <code>ENVFILE</code> argument for building my React Native application. This is easily done when generating APKs through <code>ENVFILE=.env.production assembleRelease</code> but I cannot find an equivalent for App Bundles.</p>
  
  <p>In addition, the Android Studio App Bundle wizard appears to be pretty scant when it comes to specifying options for the build.</p>
  
  <p>Any ideas?</p>