Merge pull request #37 from ContainerSolutions/analytics

Add analytics tracking to site.

Author: ianmiell

_includes/head_custom.html

@@ -0,0 +1,11 @@
+{% if jekyll.environment == 'production' %}
+<!-- Global site tag (gtag.js) - Google Analytics -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-TKE13514P9"></script>
+<script>
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', 'G-TKE13514P9');
+</script>
+{% endif %}