How to add a 3rd-party plugin?

If the plugin has CDN and you're willing to use it, simply include the plugin into your HTML pages by adding css and js files of the plugin from CDN. If you want to host the plugin on your own server, put the plugin inside /assets/plugin and import it into your HTML pages.

To configure and initialize the plugin, write the required JS code inside /assets/js/script.js file with the help of the plugin's documentation.