custom.html

<!-- start custom head snippets -->

<!-- Bootstrap -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous">
<script defer src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-geWF76RCwLtnZ8qwWowPQNguL3RmwHVBC9FhGdlKrxdiJJigb/j/68SIy3Te4Bkz" crossorigin="anonymous"></script>

<!-- Maintain template integrity and overwrite Bootstrap by linking stylesheet twice -->
{%- include snippets/prepend-baseurl.html path='/assets/css/main.css' -%}
<link rel="stylesheet" href="{{ __return }}">

<!-- AOS -->
<link href="https://unpkg.com/aos@2.3.1/dist/aos.css" rel="stylesheet">
<script src="https://unpkg.com/aos@2.3.1/dist/aos.js"></script>
<script>window.onload = () => AOS.init()</script>

<!-- end custom head snippets -->