docs/source/_templates/layout.html

{% extends "!layout.html" %}

{% block footer %}
{{ super() }}
<script>
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  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
  ga('create', 'UA-49769510-1', 'ceres-solver.org');
  ga('send', 'pageview');
</script>
{% endblock %}