After cloning repo, create a droplet on DigitalOcean to act as your admin node. You will use this node post-deployment to use docker-machine and docker-compose. Add the public IP of the droplet to the hosts file under the admin group.
Generate an API Token from DigitalOcean and pass that and the number of Swarm Nodes you would like:
$ ansible-playbook -i hosts -e API_TOKEN=<your_token_here> -e NODE_COUNT=2 deploy.yml
This will install docker, docker-machine and docker-compose on the admin node. Additionally it will create a swarm-master and 2 swarm-nodes, ready to go for deployment with docker-compose.