webpack.config.js

const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = {
  entry: './src/main.js',
  output: {
    path: './build',
    filename: 'bundle.js',
  },
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: 'babel',
        query: { presets: ['es2015', 'react'] },
      },
    ],
  },
  plugins: [
    new CopyWebpackPlugin([
      { from: './src/index.html' },
    ]),
  ],
};