webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const Dotenv = require('dotenv-webpack');

const outputDirectory = 'dist';

module.exports = {
  entry: ['babel-polyfill', './src/client/index.js'],
  output: {
    path: path.join(__dirname, outputDirectory),
    filename: 'bundle.js',
    publicPath: '/'
  },
  module: {
    rules: [{
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader']
      },
      {
        test: /\.(png|woff|woff2|eot|ttf|svg)$/,
        loader: 'url-loader?limit=100000'
      }
    ]
  },
  resolve: {
    extensions: ['*', '.js', '.jsx']
  },
  devServer: {
    contentBase: path.join(__dirname, outputDirectory),
    historyApiFallback: true,
    port: 3000,
    open: true
  },
  plugins: [
    new CleanWebpackPlugin([outputDirectory]),
    new HtmlWebpackPlugin({
      template: './public/index.html',
      favicon: './public/favicon.ico'
    }),
    new CopyWebpackPlugin(
      [
        { from: 'og-tag-image.png' }
      ], { context: './public' }
    ),
    new Dotenv()
  ]
};