Add setup instructions

Author: Kadi Kraman

Example/README.md

@@ -1,3 +1,26 @@
 # React Native App Auth Example
 
 ![Demo](demo.gif)
+
+## Running the iOS app
+
+After cloning the repository, run the following:
+
+```sh
+cd react-native-app-auth/Example
+yarn
+(cd ios && pod install)
+npx react-native run-ios
+```
+
+## Running the Android app
+
+After cloning the repository, run the following:
+
+```sh
+cd react-native-app-auth/Example
+yarn
+npx react-native run-android
+```
+
+Note that you have to have the emulator open before running the last command. If you have difficulty getting the emulator to connect, open the project from Android Studio and run it through there.