Add GOOGLE_ANALYTICS_PROPERTY_IDS for dynamic set ID

templates/google_analytics.html

@@ -0,0 +1,13 @@
+{% if GOOGLE_ANALYTICS_PROPERTY_ID %}
+    <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','https://www.google-analytics.com/analytics.js','ga');
+
+        ga('create', '{{ GOOGLE_ANALYTICS_PROPERTY_ID }}', 'auto');
+        ga('send', 'pageview');
+    </script>
+{% else %}
+    <!-- Empty analytics -->
+{% endif %}