title: ReferenceError: path is not defined: Express
body: <p>The page is rendered but it gives an error when I press any link.</p>
  
  <pre><code>ReferenceError: path is not defined
  at app.get (/var/www/example.com/example-domain/server.js:106:19)
  at Layer.handle [as handle_request] (/var/www/example.com/example-domain/node_modules/express/lib/router/layer.js:95:5)
  at next (/var/www/example.com/example-domain/node_modules/express/lib/router/route.js:137:13)
  at Route.dispatch (/var/www/example.com/example-domain/node_modules/express/lib/router/route.js:112:3)
  at Layer.handle [as handle_request] (/var/www/example.com/example-domain/node_modules/express/lib/router/layer.js:95:5)
  at /var/www/example.com/example-domain/node_modules/express/lib/router/index.js:281:22
  at param (/var/www/example.com/example-domain/node_modules/express/lib/router/index.js:354:14)
  at param (/var/www/example.com/example-domain/node_modules/express/lib/router/index.js:365:14)
  at Function.process_params (/var/www/example.com/example-domain/node_modules/express/lib/router/index.js:410:3)
  at next (/var/www/example.com/example-domain/node_modules/express/lib/router/index.js:275:10)
  </code></pre>
  
  <p>Here is the code from server.js:</p>
  
  <pre><code>app.use(express.static('../build'));
  app.get('*', (req, res)=&gt; {
    const index = path.join(__dirname, '/', '../build', 'index.html' );
    res.sendFile(index);
  });
  </code></pre>
  
  <p>Thanks in advance.</p>