webpack.build.config.js

const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { spawn } = require('child_process');

// Config directories
const SRC_DIR = path.resolve(__dirname, 'src');
const OUTPUT_DIR = path.resolve(__dirname, 'dist');

// Any directories you will be adding code/files into, need to be added to this array so webpack will pick them up
const defaultInclude = [SRC_DIR];

module.exports = {
  mode: 'production',
  entry: SRC_DIR + '/index.js',
  stats: 'minimal',
  output: {
    path: OUTPUT_DIR,
    publicPath: './',
    filename: 'bundle.js'
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [{ loader: 'style-loader' }, { loader: 'css-loader' }],
        include: defaultInclude
      },
      {
        test: /\.jsx?$/,
        use: [{ loader: 'babel-loader' }],
        include: defaultInclude
      },
      {
        test: /\.(jpe?g|png|gif)$/,
        use: [{ loader: 'file-loader?name=img/[name]__[hash:base64:5].[ext]' }],
        include: defaultInclude
      },
      {
        test: /\.(eot|svg|ttf|woff|woff2)$/,
        use: [{ loader: 'file-loader?name=font/[name]__[hash:base64:5].[ext]' }],
        include: defaultInclude
      }
    ]
  },
  target: 'electron-renderer',
  plugins: [
    new HtmlWebpackPlugin(),
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify('development'),
      'global': {}, // bizarre lodash(?) webpack workaround
      'global.GENTLY': false // superagent client fix
    })
  ],
  devtool: 'cheap-source-map',
  devServer: {
    static: OUTPUT_DIR,
    onBeforeSetupMiddleware() {
      spawn(
        'electron',
        ['.'],
        { shell: true, env: process.env, stdio: 'inherit' }
      )
      .on('close', code => process.exit(0))
      .on('error', spawnError => console.error(spawnError));
    }
  }
};