update disqus with baseurl

_config.yml

@@ -112,3 +112,4 @@ description: "Intended as a documentation theme based on Jekyll for technical wr
 
 # needed for sitemap.xml file only
 url: http://idratherbewriting.com
+baseurl: /documentation-theme-jekyll

_includes/disqus.html

@@ -8,7 +8,7 @@
      */
 
     var disqus_config = function () {
-        this.page.url = "{{site.url}}/{{page.permalink}}";  // Replace PAGE_URL with your page's canonical URL variable
+        this.page.url = "{{site.url}}{{site.baseurl}}/{{page.permalink}}";  // Replace PAGE_URL with your page's canonical URL variable
         this.page.identifier = "{{page.permalink}}"; // Replace PAGE_IDENTIFIER with your page's unique identifier variable
     };