Just use webpack dev serve to develop.

Author: kelp404

config/default.js

@@ -14,6 +14,6 @@
   </p>
 </div>
 <a href="https://github.com/kelp404/react-hooks-shared-state"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_gray_6d6d6d.png" alt="Fork me on GitHub"></a>
-<script type="text/javascript" src="http://localhost:8001/app.js"></script>
+<script type="text/javascript" src="/app.js"></script>
 </body>
 </html>

example/index.html

@@ -4,8 +4,8 @@
   "description": "A global state for React with Hooks API.",
   "main": "index.js",
   "scripts": {
-    "start": "concurrently --kill-others \"./node_modules/webpack-dev-server/bin/webpack-dev-server.js\" \"./node_modules/nodemon/bin/nodemon.js example/server.js --watch example/server.js\"",
-    "build": "./node_modules/webpack/bin/webpack.js --mode=production",
+    "start": "./node_modules/webpack-dev-server/bin/webpack-dev-server.js",
+    "build": "./node_modules/webpack/bin/webpack.js --env.mode=production",
     "test": "echo \"Error: no test specified\" && exit 1",
     "ncu": "./node_modules/npm-check-updates/bin/ncu"
   },
@@ -34,17 +34,13 @@
     "@babel/preset-env": "7.4.3",
     "@babel/preset-react": "7.0.0",
     "babel-loader": "8.0.5",
-    "concurrently": "4.1.0",
-    "config": "3.1.0",
     "eslint": "5.16.0",
     "eslint-config-xo": "0.26.0",
     "eslint-config-xo-react": "0.19.0",
     "eslint-config-xo-space": "0.21.0",
     "eslint-plugin-react": "7.12.4",
     "eslint-plugin-react-hooks": "1.6.0",
-    "express": "4.16.4",
     "jest": "24.7.1",
-    "nodemon": "1.18.11",
     "npm-check-updates": "3.1.8",
     "react-dom": "16.8.6",
     "webpack": "4.30.0",

example/server.js

@@ -1,20 +1,23 @@
 const path = require('path');
 
-module.exports = () => ({
+module.exports = (env = {}) => ({
   target: 'web',
-  mode: 'development',
+  mode: env.mode || 'development',
   entry: {
     app: path.join(__dirname, 'example', 'app.js')
   },
   devServer: {
     host: 'localhost',
-    port: 8001,
-    headers: {
-      'Access-Control-Allow-Origin': '*',
-      'Access-Control-Max-Age': '3000',
-      'Access-Control-Allow-Headers': 'Content-Type, Authorization',
-      'Access-Control-Allow-Methods': 'GET'
-    }
+    port: 8000,
+    contentBase: path.join(__dirname, 'example'),
+    historyApiFallback: {
+      rewrites: [
+        {
+          from: /.*/,
+          to: 'index.html'
+        }
+      ]
+    },
   },
   resolve: {
     extensions: ['.js']