npm install react-navigation-stack @react-native-community/masked-view react-native-safe-area-contextnpx expo install @react-navigation/stacknpm install --save react-navigation
expo install react-native-gesture-handler react-native-reanimated react-native-screens react-native-safe-area-context @react-native-community/masked-view
npm install --save react-navigation-stack
import { createAppContainer } from 'react-navigation';
import { createStackNavigator } from 'react-navigation-stack';