old_contents: // Bootstrap environment
  require('babel-register');
  require('babel-polyfill');
  
  const WebpackIsomorphicTools = require('webpack-isomorphic-tools');
  const config = require('./config').default;
  const polyfillLocales = require('./intl/polyfillLocales');
  const rootDir = require('path').resolve(__dirname, '..', '..');
  const webpackIsomorphicAssets = require('../../webpack/assets');
  
  if (!process.env.NODE_ENV) {
    throw new Error(
      'Environment variable NODE_ENV must be set to development or production.'
    );
  }
  
  polyfillLocales(global, config.locales);
  
  global.Promise = require('../common/configureBluebird');
  
  global.webpackIsomorphicTools = new WebpackIsomorphicTools(webpackIsomorphicAssets)
    .development(!config.isProduction)
    .server(rootDir, () => {
      require('./main');
    });
  
new_contents: // Bootstrap environment
  require('babel-register');
  require('babel-polyfill');
  
  const WebpackIsomorphicTools = require('webpack-isomorphic-tools');
  const config = require('./config').default;
  const polyfillLocales = require('./intl/polyfillLocales');
  const rootDir = require('path').resolve(__dirname, '..', '..');
  const webpackIsomorphicAssets = require('../../webpack/assets').default;
  
  if (!process.env.NODE_ENV) {
    throw new Error(
      'Environment variable NODE_ENV must be set to development or production.'
    );
  }
  
  polyfillLocales(global, config.locales);
  
  global.Promise = require('../common/configureBluebird');
  
  global.webpackIsomorphicTools = new WebpackIsomorphicTools(webpackIsomorphicAssets)
    .development(!config.isProduction)
    .server(rootDir, () => {
      require('./main');
    });
  
subject: Add missing default