webpack.config.js

const HtmlWebpackPlugin = require('html-webpack-plugin');
const path = require('path');

module.exports = env => {
	const devmode = env.mode === 'development';

	return {
		mode: env.mode,
		devtool: devmode ? 'cheap-module-eval-source-map' : 'source-map',
		entry: './client/index.js',
		output: {
			path: '/',
			filename: 'bundle.js'
		},
		module: {
			rules: [
				{
					test: /\.js$/,
					enforce: 'pre',
					loader: 'eslint-loader',
					options: {
						emitWarning: true,
						fix: true
					}
				},
				{
					test: /\.js$|\.jsx$/,
					exclude: /node_modules/,
					loader: 'babel-loader'
				},
				{
					test: /\.(jpe?g|png|gif|svg)$/i,
					include: [
						path.join(__dirname, 'images'),
						path.join(__dirname, 'client/src/assets')
					],
					loader: 'url-loader?limit=30000&name=images/[name].[ext]'
				}
			]
		},
		plugins: [
			new HtmlWebpackPlugin({
				template: 'client/index.html'
			})
		]
	};
};