Support multiple environments

[brandoncc]

I would like to be able to deploy at least two dokku applications from my local application. This would be used for staging and production applications. It would be useful to support more than two though, in case a user needs multiple staging-type environments.

[cbetta]

Great idea @brandoncc. What would be the best way you think? Have dokkufy app ask for a git repo name so you could do both git push dokku master and git push staging master? How would that tie into the local dokku command though?

[brandoncc]

PR created