First add the following code snippet to the head of index.pug
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', '<!-- @echo GOOGLE_ANALYTICS_TRACK_ID -->', {
'cookieDomain': 'none'
});
ga('send', 'pageview');
Then, in order to monitor your page by google analytics set the GOOGLE_ANALYTICS_TRACK_ID with the tracking id in each secrets file in the config
folder at the root of the project.