webpack.config.js

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

module.exports = {
  entry: path.join(__dirname, 'src/docs'),
  output: {
    path: path.join(__dirname, 'docs'),
    filename: 'bundle.js'
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        use: 'babel-loader',
        exclude: /node_modules/
      },
      {
        test: /\.css$/,
        use: [
          { loader: 'style-loader' },
          { loader: 'css-loader' },
          {
            loader: 'postcss-loader',
            options: {
              sourceMap: true,
              plugins: () => [ autoprefixer() ]
            }
          }
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src/docs/index.html')
    })
  ],
  resolve: {
    extensions: ['.js', '.jsx']
  },
  devServer: {
    contentBase: path.join(__dirname, 'docs'),
    port: 8000
  }
};