Handle startup error in server listen callback

Breaking change in Express v5 release

Author: mao-sz

nodeJS/authentication/sessions.md

@@ -110,7 +110,10 @@ app.get("/", (req, res) => {
 });
 
 const PORT = process.env.PORT || 3000;
-app.listen(PORT, () => {
+app.listen(PORT, (error) => {
+  if (error) {
+    throw error;
+  }
   console.log(`App listening on port ${PORT}!`);
 });
 ```