Cannot render from server

Routes.js

import React from 'react';
import { IndexRoute, Route, Link } from 'react-router';

const App = React.createClass({
  render() {
    return (
      <div>
        <h1>App</h1>
        <ul>
          <li><Link to="/about">About</Link></li>
          <li><Link to="/inbox">Inbox</Link></li>
        </ul>
        {this.props.children}
      </div>
    )
  }
})

const About = React.createClass({
  render() {
    return <h3>About</h3>
  }
})

const Inbox = React.createClass({
  render() {
    return (
      <div>
        <h2>Inbox</h2>
        {this.props.children || "Welcome to your Inbox"}
      </div>
    )
  }
})

const Message = React.createClass({
  render() {
    return <h3>Message {this.props.params.id}</h3>
  }
})

const routes = (
    <Route path="/" component={App}>
      <Route path="about" component={About} />
      <Route path="inbox" component={Inbox}>
        <Route path="messages/:id" component={Message} />
      </Route>
    </Route>
);


export default routes;

server.js

import _ from 'lodash';
import path from 'path';
import express from 'express';
import {renderToString} from 'react-dom/server';
import {match, RoutingContext} from 'react-router';
import React from 'react';
import config from './configs/config.js';
import routes from './components/Routes.js';
// import app from './app.js';

let server = express();
server = require('./configs/express.js')(server);

if (process.env.NODE_ENV === 'development') {
    server.use(express.static(path.resolve('./build/public')));
} else {
    server.use(express.static(path.resolve('./dist/public')));
}

server.use((req, res, next) => {
    // const routes = app.getComponent();
    // console.log(renderToString(<Router routes={routes}></Router>));
    match({routes: routes, location: req.url}, (error, redirectLocation, renderProps) => {
        console.log(error, redirectLocation, renderProps);
        console.log(renderToString(<RoutingContext {...renderProps}/>));
    });

    res.render('layout', {
        appContainer: _.startCase(config.appName + ' container').replace(' ', '')
    });
});

server.listen(config.port);