add script to track host

layouts/partials/analytics.html

@@ -1,2 +1,7 @@
+<script>
+    window.goatcounter = {
+        path: function(p) { return location.host + p }
+    }
+</script>
 <script data-goatcounter="https://stats.andrewnw.com/count"
         async src="//stats.andrewnw.com/count.js"></script>