fix to comments

components/sections/comments/handler.js

@@ -0,0 +1,10 @@
+module.exports = {
+  componentDidMount() {
+    if (typeof document !== "undefined") {
+      var script = document.createElement("script");
+      script.src = "lib/site/disqus.js";
+      script.async = true;
+      document.head.appendChild(script);
+    }
+  }
+};