Spaces is using open source SVG icon libraries such as Font Awesome.

Fontawesome icons

You need to include the following css file in the <head> section of your website:

<!-- Fontawesome -->
<link type="text/css" href="@@path/vendor/@fortawesome/fontawesome-free/css/all.min.css" rel="stylesheet">

The following icons are just a few examples from the huge collection of icons from Font Awesome. Go to their website to find the icons that best suit your needs.

<i class="fab fa-bootstrap mr-2"></i>
<i class="fab fa-facebook mr-2"></i>
<i class="fab fa-dribbble mr-2"></i>
<i class="fab fa-reddit mr-2"></i>
<i class="fab fa-twitter"></i>