Docker at Digital Ocean

Start an Centos Droplet at Digital Ocean with Docker Machine:

$ docker-machine create --driver digitalocean --digitalocean-region "fra1" --digitalocean-size "1gb" --digitalocean-image "centos-7-2-x64" --digitalocean-access-token $DOTOKEN mer

Remarks:

1. Update your docker installation, because a bug prevent using Centos with Docker on Cloud provider like Digital Ocean.
2. Digital Ocean regions must be lower case.
3. You need an API Token at Digital Ocean. 
4. Look at image syntax "Centos 7.2 x64" -> "centos-7-2-x64"