AppDelegate.m fixed for DEBUG, DEVICE, and PRODUCTION builds

AppDelegate.m

#if DEBUG
#if TARGET_OS_SIMULATOR
  #warning "DEBUG SIMULATOR"
  jsCodeLocation = [NSURL URLWithString:@"http://localhost:8081/index.ios.bundle?platform=ios&dev=true"];
#else
  #warning "DEBUG DEVICE"
  NSString *serverIP = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"SERVER_IP"];
  NSString *jsCodeUrlString = [NSString stringWithFormat:@"http://%@:8081/index.ios.bundle?platform=ios&dev=true", serverIP];
  NSString *jsBundleUrlString = [jsCodeUrlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
  jsCodeLocation = [NSURL URLWithString:jsBundleUrlString];
#endif
#else
  #warning "PRODUCTION DEVICE"
  jsCodeLocation = [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"jsbundle"];
#endif

#if 0
  /**
   * Loading JavaScript code - uncomment the one you want.
   *
   * OPTION 1
   * Load from development server. Start the server from the repository root:
   *
   * $ npm start
   *
   * To run on device, change `localhost` to the IP address of your computer
   * (you can get this by typing `ifconfig` into the terminal and selecting the
   * `inet` value under `en0:`) and make sure your computer and iOS device are
   * on the same Wi-Fi network.
   */

  jsCodeLocation = [NSURL URLWithString:@"http://localhost:8081/index.ios.bundle?platform=ios&dev=true"];

  /**
   * OPTION 2
   * Load from pre-bundled file on disk. The static bundle is automatically
   * generated by "Bundle React Native code and images" build step.
   */

//   jsCodeLocation = [[NSBundle mainBundle] URLForResource:@"main" withExtension:@"jsbundle"];
#endif