Unlock this challenge:
Suppose we are working on a Twig template and we need to add a CSS link to a checkout.css file that lives at public/css/. How would you do that?
checkout.css
public/css/
<link rel="stylesheet" href="/css/checkout.css">
<link rel="stylesheet" href="/public/css/checkout.css">
<link rel="stylesheet" href="{{ css('checkout.css') }}">
<link rel="stylesheet" href="{{ asset('css/checkout.css') }}">
