File: //usr/share/imunify360-webshield/captcha/templates/head.tpl
<!--
This whole tempalte goes to inside <head></head> tags
Modify this file to add javascript or css files for your page from customize/static folder
Jinja2 (which is index.html template engine) is not allowed to use here.
Please, restart captcha server after your changes.
service imunify360-captcha restart
service imunify360-captchaserver-nginx restart
Example:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
Add your custom css from customize/static/ folder
<link type="text/css" rel="stylesheet" href="static/my.css">
-->