text: import { createStackNavigator, createAppContainer } from 'react-navigation';
  import HomeScreen from './Screens/HomeScreen';
  import UpdatePriceScreen from './Screens/UpdatePriceScreen';
  
  const AppNavigator = createStackNavigator(
      {
        HomeScreen: HomeScreen,
        UpdatePriceScreen: UpdatePriceScreen,
      },
      {
        initialRouteName: 'HomeScreen',
        headerMode: 'none',
      }
  );
  
  export default createAppContainer(AppNavigator);