Comments with Disqus
While Disqus isn't the only service that you can use to serve comments on your site (see Intense Debate and CoComment), Disqus is currently the only one that is supported out of the box. Once you've created a Disqus account and added your web site to it, all you need to do is to tell Nesta what your site's Disqus key is (which Disqus refer to as your "short name").
config/config.yml file in a text editor and search for
disqus_short_name. Uncomment it, and set your site's short name. It
will look something like this:
Showing comments on a page
If the theme or templates that you're using don't include comments you can insert the relevant code by adding a line like this in your template:
= haml :comments, :layout => false