cra-template-node-express/template/src/server/webpack.config.js

You can use the template using the below command.

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

module.exports = {
  entry: [
    'webpack-hot-middleware/client',
    'react-hot-loader/patch',
    './src/client/index.js'
  ],
  output: {
    path: path.join(__dirname,'..','..', '/dist'),
    filename: 'main.js'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader']
      }
    ]
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new HtmlWebpackPlugin({
      template: './src/client/index.html'
    })
  ],
  mode: process.env.NODE_ENV || 'development',
  devtool: 'inline-source-map'
};