title: Proper steps for a React Native iOS release build
body: <p>This is just a case of lack of documentation thus far, but when creating a production release build of an iOS React Native app, after setting the Build/Archive schemes to be Release instead of debug, do I need to manually create a <code>main.bundle</code> <em>and</em> uncomment the second <code>jsCodeLocation</code> line in <code>AppDelegate.m</code>, or does something handle that for me automatically? </p>
  
  <p>I've been doing both steps manually thus far, but I'm sure there will be a day that I forget to do so, and I wanted to know what the compile and build scripts are doing for me and what I need to do myself.</p>
  
  <p>(Using react-native@0.21 if applicable.)</p>