webpack.config.js

var path = require('path');
var webpack = require('webpack');

module.exports = {
  devtool: 'eval',
  entry: [
    'webpack-dev-server/client?http://localhost:8080/',
    'webpack/hot/only-dev-server',
    './client'
  ],
  output: {
    path: path.join(__dirname, 'public'),
    filename: 'bundle.js',
    publicPath: 'http://localhost:8080/'
  },
  resolve: {
    modulesDirectories: ['node_modules', 'shared'],
    extensions: ['', '.js', '.jsx']
  },
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loaders: ['react-hot', 'babel']
      },
      {
        test: /\.scss$/,
        exclude: /node_modules/,
        loaders: ['style', 'css', 'sass?sourceMap']
      }
    ]
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NoErrorsPlugin(),
    new webpack.DefinePlugin({
      DEV: true
    })
  ],
  devServer: {
    hot: true,
    proxy: {
      '*': 'http://localhost:' + (process.env.PORT || 3000)
    }
  }
};