google analytics added

Author: ryanhammonds

doc/_templates/layout.html

@@ -0,0 +1,16 @@
+{% extends "!layout.html" %}
+
+{%- block extrahead %}
+{{ super() }}
+
+<!-- Global site tag (gtag.js) - Google Analytics -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=UA-172157729-1"></script>
+<script>
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', 'UA-172157729-1');
+</script>
+
+{% endblock %}