Recently i switched to Hugo and I thought Disqus would suit my needs, until I realized how fucked up is Disqus (thanks David!). Then I decided to change it to Commento.
Easy: I used this and deployed to Heroku knowing by heart the URL i would be using for storing the website on it.
Easy: You add the website you want to manage on the leftmost part after registering - remember to disable registration after creating your admin account(s).
You tell me, enjoy :P