Add lines to AppDelegate to ease iOS development

ios/ThaliApp/AppDelegate.m

@@ -26,8 +26,25 @@
   [[UNUserNotificationCenter currentNotificationCenter] setDelegate:self];
   
   NSURL *jsCodeLocation;
-
+  
+#if DEBUG
+  // For Debug build load from development server. Start the server from the repository root:
+  //
+  // $ npm start
+#if TARGET_IPHONE_SIMULATOR
+  // Run from locally running dev server
+  jsCodeLocation = [NSURL URLWithString:@"http://localhost:8081/index.bundle?platform=ios"];
+#else
+  // Run on device with code coming from dev server on PC (change the IP to your PCs IP)
+  jsCodeLocation = [NSURL URLWithString:@"http://192.168.1.1:8081/index.bundle?platform=ios"];
+#endif
+#else
+  // For production load from pre-bundled file on disk. To re-generate the static bundle, run
+  //
+  // $ curl http://localhost:8081/index.ios.bundle -o main.jsbundle
   jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index" fallbackResource:nil];
+#endif
+
 
   RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
                                                       moduleName:@"ThaliApp"