Refactor templates and rearrange its path

public/views/shared/disqus.ejs

@@ -0,0 +1,14 @@
+<div id="disqus_thread"></div>
+<script>
+var disqus_config = function () {
+    this.page.identifier = window.location.pathname.split('/').slice(-1)[0];
+};
+(function() {
+    var d = document, s = d.createElement('script');
+    s.src = '//<%= disqus %>.disqus.com/embed.js';
+    s.setAttribute('data-timestamp', +new Date());
+    (d.head || d.body).appendChild(s);
+})();
+</script>
+<noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>
+