feat: add marketo analytics to documentation website (#281)

* feat: add marketo analytics to documentation website

website/siteConfig.js

@@ -72,7 +72,13 @@ const siteConfig = {
   },
 
   // Add custom scripts here that would be placed in <script> tags.
-  scripts: ["https://buttons.github.io/buttons.js"],
+  scripts: [
+    "https://buttons.github.io/buttons.js",
+    {
+      src: "js/marketo.js",
+      defer: true
+    }
+  ],
 
   // On page navigation for the current documentation page.
   onPageNav: "separate",

website/static/js/marketo.js

@@ -0,0 +1,21 @@
+/* eslint-disable no-undef */
+(function() {
+  var didInit = false;
+  function initMunchkin() {
+    if (didInit === false) {
+      didInit = true;
+      Munchkin.init("418-ESG-906");
+    }
+  }
+  var s = document.createElement("script");
+  s.type = "text/javascript";
+  s.async = true;
+  s.src = "//munchkin.marketo.net/munchkin.js";
+  s.onreadystatechange = function() {
+    if (this.readyState === "complete" || this.readyState === "loaded") {
+      initMunchkin();
+    }
+  };
+  s.onload = initMunchkin;
+  document.getElementsByTagName("head")[0].appendChild(s);
+})();