Is this doing it right?

devServer.js

import webpack from "webpack";
import WebpackDevServer from "webpack-dev-server";
import config from "./webpack.config";

const host = 'localhost';
const port = 9080;

config.devtool = 'eval';
config.entry.push('webpack-dev-server/client?http://'+host+':'+port);
config.entry.push('webpack/hot/only-dev-server');

new WebpackDevServer(webpack(config), {
  publicPath: config.output.publicPath,
  hot: true,
  historyApiFallback: true
}).listen(port, host, function (err, result) {
  if (err) {
    console.log(err);
  }

  console.log('Listening at '+host+':'+port);
});

webpack.config.json

var path = require('path');
var webpack = require('webpack');
var ExtractTextPlugin = require('extract-text-webpack-plugin');

module.exports = {
  entry: [
    './src/index'
  ],
  output: {
    filename: 'bundle.js',
    path: path.join(__dirname, 'build'),
    publicPath: '/build/'
  },

  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new ExtractTextPlugin('bundle.css', {
      allChunks: true
    })
  ],
  resolve: {
    extensions: ['', '.js', '.jsx']
  },
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        loaders: ['react-hot', 'babel-loader'],
        include: path.join(__dirname, 'src'),
        exclude: /node_modules/
      },
      {
        test: /\.css$/,
        loader: 'style-loader!css-loader'
      },
      {
        test: /\.scss$/,
        loader: ExtractTextPlugin.extract('css!sass')
      }
    ]
  }
};