Webpack config boilerplate to React project

packageWebpackReactBoilerplate.json

{
  "scripts": {
    "build": "webpack",
    "start": "webpack-dev-server"
  },
  "devDependencies": {
    "babel-core": "^6.5.2",
    "babel-loader": "^6.2.3",
    "babel-preset-es2015": "^6.5.0",
    "babel-preset-react": "^6.5.0",
    "babel-preset-react-hmre": "^1.1.0",
    "babel-preset-survivejs-kanban": "^0.3.3",
    "babel-register": "^6.5.2",
    "css-loader": "^0.23.1",
    "npm-install-webpack-plugin": "^2.0.2",
    "style-loader": "^0.13.0",
    "webpack": "^1.12.14",
    "webpack-dev-server": "^1.14.1",
    "webpack-merge": "^0.7.3"
  },
  "dependencies": {
    "alt": "^0.18.2",
    "alt-container": "^1.0.2",
    "alt-utils": "^1.0.0",
    "node-uuid": "^1.4.7",
    "react": "^0.14.7",
    "react-dom": "^0.14.7"
  }
}

webpack.config.babel.js

/* @flow */

import path             from 'path';
import webpack          from 'webpack';
import merge            from 'webpack-merge';
import NpmInstallPlugin from 'npm-install-webpack-plugin';

const TARGET = process.env.npm_lifecycle_event;
const PATHS = {
  app: path.join(__dirname, 'app'),
  build: path.join(__dirname, 'build')
};

process.env.BABEL_ENV = TARGET;

const common = {
  entry: {
    app: PATHS.app
  },
  resolve: {
    extensions: ['', '.js', '.jsx']
  },
  output: {
    path: PATHS.build,
    filename: 'bundle.js'
  },
  module: {
    loaders: [
      {
        test: /\.css$/,
        loaders: ['style', 'css'],
        include: PATHS.app
      },
      {
        test: /\.jsx?$/,
        loaders: ['babel?cacheDirectory'],
        include: PATHS.app
      }
    ]
  }
};

if (TARGET === 'start' || !TARGET) {
  module.exports = merge(common, {
    devtool: 'eval-source-map',
    devServer: {
      contentBase: PATHS.build,

      historyApiFallback: true,
      hot: true,
      inline: true,
      progress: true,

      stats: 'errors-only',

      host: process.env.HOST,
      port: process.env.PORT
    },
    plugins: [
      new webpack.HotModuleReplacementPlugin(),
      new NpmInstallPlugin({
        save: true
      })
    ]
  });
}

if (TARGET === 'build') {
  module.exports = merge(common, {});
}