So I'm learning Rails myself and I'm nervous about the whole deploy to Heroku part / the cost of hosting a small app. Did you have to buy additional Dynos to handle the traffic from HN? $35 for an additional Dyno isn't the end of the world, but shared hosting for $5 a month at railsplayground is a whole lot cheaper for a humble junior developer like me.

The site looks great! Congrats on your first app launch!