I'm very interested in this. Do you guys support Rails 4, PostgreSQL? There are a few icons there in the landing page but no tooltips or anything to let me know what they are. I want something in between DigitalOcean (barebones) and Heroku (configures everything but doesn't let you customize anything either) - this seems like a perfect fit.
We don't support Rails and PostgreSQL quite yet, but they are both in our future plans, so we should have support for them soon.
You can also make requests on our wiki for frameworks you would like us to support: https://github.com/jumpstarter-io/help/issues