Update README.md

react-native/README.md

@@ -1,4 +1,7 @@
 # React Native and Motoko integration
+1. Run: npm install
+2. Generate the APK for Android following this guide: https://reactnative.dev/docs/0.70/signed-apk-android
+3. Run on the iOS Simulator: https://reactnative.dev/docs/0.70/running-on-simulator-ios (sorry, I don't have an iPhone to test)
 
 ## Notes
 1. There's no support for Wasm on Android and iOS (the former uses a JavaScript engine that doesn't support WebAssembly and react-native-v8 fails when calling WASI.init(), and the latter only works on the iPhone Emulator and is disabled on the real hardware since iOS 15), we had to use wasm2js from https://github.com/WebAssembly/binaryen to be able to communicate with the Motoko lib