Use gliderlabs/herokuish docker image

[CEikermann]

Currently the project is using a self maintained herokuish container based on a self maintained heroku cedar14 image.

gliderlabs/herokuish published a container image based on the official heroku cedar14 image.

Maybe use them to reduce the maintenance, if this is possible

[CEikermann]

"E: Unable to locate package docker-engine"

Can you retrigger this build?

[progrium]

Need to get this on CircleCI ... I can't really use wercker.

Anyway, the plan for buildstep is to be replaced by buildkit which is more general. The usecase of buildstep now can pretty much be replaced entirely by just using herokuish. I'm pretty sure that's why this hasn't been done here yet. Dokku just uses Herokuish. Am I right @josegonzalez ?

[josegonzalez]

Yeah, we just use herokuish. Seems to work, was mostly a drop-in replacement for buildstep.

[CEikermann]

@progrium have you a link for buildkit ? :)