content: 
  import React from 'react';
  import { Route } from 'react-router-dom';
  import { Switch } from 'react-router';
  
  import App from "./components/App";
  import Greetings from "./components/Greetings";
  import SignupPage from "./components/SignupPage";
  import NavigationBar from './components/NavigationBar';
  import LoginPage from './components/LoginPage';
  
  export default (
    <div className="container">
      <App />
      <Switch>
        <Route exact path="/" component={Greetings} />
        <Route path="/signup" component={SignupPage} />
        <Route path="/login"  component={LoginPage} />
      </Switch>
    </div>
  );
  