title: How to add `pod install` step to ios build process
body: <p>I have just installed a dependency in my react-native project that required manual configuration of <code>ios/Podfile</code>. </p>
  
  <p>If I have a fresh clone of the repository for this project, <code>react-native run-ios</code> will fail to work until I run <code>pod install</code> within the context of the ios folder. I'd like to get that to automatically happen as part of the ios build instead of being a separate step.</p>
  
  <p>I've tried adding <code>pod install</code> as a "Run Script" in xcode and moved it to the top of the build order, but no luck with that. </p>
  
  <p>How can I add a <code>pod install</code> step to the ios build process?</p>