configuraation annotator on xampp/wammp ?

[garik-pilot]

nodejs is web server itself and xampp/wampp are web servers as well. Why we nee to install two web servers? When the annotator is configured on node.js it can be used on http://localhost:3000/annotation/testuser/demo.html. Do we really need x|wammp as described in the instructions "This aplication uses MySQL and Apache 4.2.2, you need to install Xampp [https://www.apachefriends.org/index.html], Wampp [http://www.wampserver.com/en/], or similar software. Xampp and Wampp installs Apache, MySQL, PHP, phpMyAdmin and Perl." ?
What are the configuration changes need to be done to use x|wammp? Could you advise step-by-step?

thanks