webpack.config.js

const webpack = require('webpack')
const path = require('path')

const config = {
  entry: ['react-hot-loader/patch', './src/index.js'],
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        use: 'babel-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
    ],
  },
  resolve: {
    extensions: ['.js', '.jsx'],
    alias: {
      'react-dom': '@hot-loader/react-dom',
    },
  },
  devtool: 'source-map',
  devServer: {
    host: '0.0.0.0',
    disableHostCheck: true,
    https: true,
    contentBase: './dist',
    proxy: {
      '/socket.io': {
        target: 'http://localhost:3000',
        ws: true,
      },
    },
    historyApiFallback: {
      index: 'index.html',
    },
  },
  plugins: [
    new webpack.ProvidePlugin({
      process: 'process/browser',
    }),
  ],
}

module.exports = config