Remove CSS and javascript automatically on wordpress site.

I need someone who can create anything which removes automatically unused CSS and javascript. Ideally it would be a plugin. Important is to give clear advice how to use that on another projects also. Ideally it works with existing modules (node.js, gulp, grunt etc.) so not everything must be written new. It should work well together with another Wordpress plugins like WP Rocket, WP Super cache, Yoast SEO, AMP, Autoptimize, WPForms etc. Only remote access is given, no user data and no passwords. That means you would get remote access to our PC, so we can see what you are doing. Server: Ubuntu 18.04 PHP: 7.2xx Admin-Interface: Plesk/Onyx Wordpress-Version: 5.4x Webserver: Apache/nginx