webpack.config.js

webpack = require('webpack');

module.exports = {
    entry: './main.js',
    output: {
        path: './',
        filename: 'index.js'
    },
    devServer: {
        inline: true,
        port: 9000
    },
    plugins: [
      new webpack.DefinePlugin({
        // use minified version of react
        'process.env': {
          'NODE_ENV': JSON.stringify('production')
        }
      })
    ],
    module: {
        loaders: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                // update babelrc to include es2015 and react
                loader: 'babel',
                // query: {
                //     presets: []
                // }
            }
        ]
    }
}