wundertile/web/webpack.config.js

const path = require('path')

module.exports = {
  entry: './index.js',
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, '../app/static')
  },
  module: {
    rules: [{
      test: /\.js$/,
      use: ['babel-loader']
    }, {
      test: /\.css$/,
      use: ['style-loader', 'css-loader']
    }, {
      test: /\.(png|jpg|gif)$/,
      use: ['url-loader']
    }]
  }
}