JavaScriptServices/templates/ReactSpa/webpack.config.prod.js

var webpack = require('webpack');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var extractCSS = new ExtractTextPlugin('site.css');

module.exports = {
    module: {
        loaders: [
            { test: /\.css/, loader: extractCSS.extract(['css']) },
        ]
    },
    plugins: [
        extractCSS,
        new webpack.optimize.UglifyJsPlugin({ minimize: true })
    ]
};