docs/_includes/head.html

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=Edge">

    <link rel="stylesheet" href="{{ '/assets/css/just-the-docs-default.css' | relative_url }}">

    <!-- Google Tag Manager -->
    <script>(function (w, d, s, l, i) {
        w[l] = w[l] || [];
        w[l].push({
            'gtm.start':
                new Date().getTime(), event: 'gtm.js'
        });
        var f = d.getElementsByTagName(s)[0],
            j = d.createElement(s), dl = l != 'dataLayer' ? '&l=' + l : '';
        j.async = true;
        j.src =
            'https://www.googletagmanager.com/gtm.js?id=' + i + dl;
        f.parentNode.insertBefore(j, f);
    })(window, document, 'script', 'dataLayer', 'GTM-WQS7M2G');</script>
    <!-- End Google Tag Manager -->

    {% if site.search_enabled != false %}
    <script type="text/javascript" src="{{ '/assets/js/vendor/lunr.min.js' | relative_url }}"></script>
    {% endif %}
    <script type="text/javascript" src="{{ '/assets/js/just-the-docs.js' | relative_url }}"></script>

    <meta name="viewport" content="width=device-width, initial-scale=1">

    {% seo %}

    {% include head_custom.html %}
    {% include head_fonts.html %}

</head>