Production ready webpack-config for serverless functions -- suggestions are welcome!

webpack-config.js

const webpack = require('webpack');
const nodeExternals = require('webpack-node-externals');
const CompressionPlugin = require('compression-webpack-plugin')
const path = require('path');

module.exports = {
	entry: ['babel-polyfill', './handler.js'],
	target: 'node',
	externals: [nodeExternals()],
	output: {
		libraryTarget: 'commonjs',
		path: path.join(__dirname, './.webpack'),
		filename: 'handler.js',
		sourceMapFilename: 'handler.map.js',
	},
	devtool: 'eval',
	module: {
		loaders: [
			{
				test: /\.js?/,
				exclude: ['node_modules'],
				loader: 'babel-loader',
				query: {
					cacheDirectory: true,
					plugins: [
						'babel-plugin-root-import', 'transform-runtime', 'transform-regenerator',
					],
					presets: ['es2015', 'stage-0'],
				},
			},
		],
	},
	plugins: [
		// new webpack.IgnorePlugin(/aws-sdk/),
		new webpack.NoEmitOnErrorsPlugin(),
		new webpack.optimize.UglifyJsPlugin({
			mangle: true,
			comments: false,
			compress: {
				warnings: false, // Suppress uglification warnings
				pure_getters: true,
				unsafe: true,
				unsafe_comps: true,
			},
			output: {
				comments: false,
			},
			exclude: [/\.min\.js$/gi], // skip pre-minified libs
		}),
		new CompressionPlugin({ asset: '[path].gz[query]', algorithm: 'gzip', test: /\.js/, threshold: 10240, minRatio: 0 }),
	],
};