webpack.config.js

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

const isProduction = process.env.NODE_ENV === 'production';

module.exports = {
  entry: './client/src/index.js',
  mode: isProduction ? 'production' : 'development',
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.js'
  },
  plugins: [
    new CleanWebpackPlugin(['build']),
    new HtmlWebpackPlugin({
      title: 'Speech',
      template: './client/index.html'
    })
  ],
  devtool: isProduction ? 'source-map' : 'inline-source-map',
  devServer: {
    contentBase: './build'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader'
      }
    ]
  },
};