24 karma · joined February 12, 2015
In that case, you might be interested in bosh: http://bosh.io/docs/problems.html (the tool that enables the workflow jacques_chester was describing). It embraces the idea of reliably building from source for the exact reasons you've mentioned.
Your solution probably works great for your needs, but this stuff is expensive to productize. See https://www.openshift.org/
Is this your product? All of your comments are about it.
I'm not sure why that's a problem. If you want something that's actually like heroku like in terms of uptime and what not, you need something that can manage the health of the cluster. Dokku's cool, but it doesn't make sense for anything you actually need to depend on. If it doesn't make sense to pay for the overhead of running your own paas, just use Heroku instead.
Check out bosh: http://bosh.cloudfoundry.org/ . It has a somewhat similar philosophy with respect to immutable instances and systems at large, and has strong corporate backing.