title: How to fix cocoapods trunk cdn issue?
body: <p>I am trying to setup a react-native app from scratch.
  During install, I get the following error</p>
  
  <p>Analyzing dependencies
  Fetching podspec for <code>DoubleConversion</code> from <code>../node_modules/react-native/third-party-podspecs/DoubleConversion.podspec</code>
  Fetching podspec for <code>Folly</code> from <code>../node_modules/react-native/third-party-podspecs/Folly.podspec</code>
  Fetching podspec for <code>glog</code> from <code>../node_modules/react-native/third-party-podspecs/glog.podspec</code>
  Adding spec repo <code>trunk</code> with CDN <code>https://cdn.cocoapods.org/</code>
  [!] Unable to add a source with url <code>https://cdn.cocoapods.org/</code> named <code>trunk</code>.
  You can try adding it manually in <code>/Users/sachinchandorkar/.cocoapods/repos</code> or via <code>pod repo add</code>.</p>
  
  <p>I have tried installing the pod manually without success</p>