This is the boilerplate, once you've installed [React Native] and the Renco CLI, you can get started with this boilerplate.
Prerequisite: install the React Native CLI -- choose React Native CLI, not Expo.
First, install Renco globally:
npm install -g renco
# or
yarn global add renco
renco new MyApp
cd into your new app and run react-native run-ios or react-native run-android (note: in Android, you'll need an Android emulator running or an Android phone attached).