_layouts/default.html

<!DOCTYPE html>
<html>

  {% include head.html %}

  <body>

    {% include header.html %}

    <div class="page-content">
      <div class="wrapper">
        {{ content }}
      </div>
    </div>

    {% include footer.html %}

    <!-- Google Analytics -->

    <!-- <script>
      (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
      (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
      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-28181852-21', 'auto');
      ga('send', 'pageview');

    </script> -->

    <!-- Google tag (gtag.js) -->
    <script async src="https://www.googletagmanager.com/gtag/js?id=G-PY71RTY5GV"></script>
    <script>
      window.dataLayer = window.dataLayer || [];
      function gtag(){dataLayer.push(arguments);}
      gtag('js', new Date());

      gtag('config', 'G-PY71RTY5GV');
    </script>

    <script src="/js/site.js"></script>

    {% for script in page.scripts %}
    <script src="{{ script }}"></script>
    {% endfor %}

  </body>

</html>