Docker is not enough
$ vagrant up # local dev
$ contrib/ec2/provision-ec2-cluster.sh # ec2
$ contrib/rackspace/provision-rackspace-cluster.sh # rackspace
$ pip install deis
$ deis register deis-controller.fqdn
$ deis init dev deisapp.com --hosts=host1,host2,host3 --auth=~/.ssh/key.pem