render.js

import React from 'react';
import ReactDOMServer from 'react-dom/server';
import App from './components/app';
import remark from 'remark';
import slug from 'remark-slug';
import content from './content';
import fs from 'fs';

var ast = remark().use(slug).run(remark().parse(content));

var template = fs.readFileSync('./template.html', 'utf8');

fs.writeFileSync('./index.html',
  template.replace('APP',
  ReactDOMServer.renderToString(
    <App ast={ast} content={content} />)));