add datadog and heap (#16)

* add datadog

* also added heap

pkg/dashboard/static/datadog.js

@@ -0,0 +1,18 @@
+(function(h,o,u,n,d) {
+    h=h[d]=h[d]||{q:[],onReady:function(c){h.q.push(c)}}
+    d=o.createElement(u);d.async=1;d.src=n
+    n=o.getElementsByTagName(u)[0];n.parentNode.insertBefore(d,n)
+})(window,document,'script','https://www.datadoghq-browser-agent.com/datadog-rum-v4.js','DD_RUM')
+    DD_RUM.onReady(function() {
+    DD_RUM.init({
+        clientToken: 'pub16d64cd1c00cf073ce85af914333bf72',
+        applicationId: 'e75439e5-e1b3-46ba-a9e9-a2e58579a2e2',
+        site: 'datadoghq.com',
+        service: 'helm-dashboard',
+        version: '0.0.6',
+        trackInteractions: true,
+        trackResources: true,
+        trackLongTasks: true,
+        defaultPrivacyLevel: 'mask'
+    })
+})