nirvana_old/App.js

import 'react-native-gesture-handler';
import * as React from 'react';
import { NavigationContainer } from '@react-navigation/native';
import { createStackNavigator } from '@react-navigation/stack';

import SignIn from './SignIn.js';

import { StyleSheet, Text, View } from 'react-native';
import { StatusBar } from 'expo-status-bar';

const Stack = createStackNavigator();

export default function App() {
  return (
    <NavigationContainer>
      <Stack.Navigator>
        <Stack.Screen name="SignIn" component={SignIn} />
      </Stack.Navigator>
    </NavigationContainer>
  );
}