TL;DR
As I’ve mentioned before, Opa is a new web framework that introduces not only the framework itself but a whole new language. A lot has changed in Opa since I last posted about it. Now Opa has a Javascript-esque look and runs on Node.js. But it still has the amazing typing system that makes Opa a joy to code in.
The currently available Heroku buildpack for Opa only supported the old, pre-Node, support. ...