Please follow the instructions to setup the environment here.
NOTE: Please ensure you select the React Native CLI Quickstart instructions, NOT the Expo CLI Quickstart.
You can then select specific instructions for which Development OS you are using (macOS/Windows/Linux), and which target OS (iOS/Android).
Follow the instructions up until "Creating a new application".
To install the app, change directory into the project root, pride-london-new-app folder, and run yarn to install dependencies. For iOS, you will need to:
cd ios && pod install
This uses CocoaPods (a dependency manager like yarn for iOS libraries) to install native dependencies (Swift / Objective-C). Some react-native node_modules require dependencies on the native side in iOS, pod install is how these are added and linked.
To run the application, go back to the root directory:
cd .. && yarn start
This will start the Metro Bundler, you can think of this as the React Native version of webpack, it will compile your application.
In another terminal window, in the root of the project directory, run yarn ios to build the iOS application, and run it on the iOS Simulator. For android, run yarn android.
To view storybook in the iOS simulator / android emulator, you need to first run yarn storybook to build storybook, then in another terminal run yarn start to run the Metro Bundler, then you can open the apps, or run yarn ios or yarn android to rebuild.