Correctly stop a node using docker.
$ sudo docker pull cyberway/cyberway:v2.1.0
$ sudo curl https://raw.githubusercontent.com/cyberway/cyberway.launch/master/docker-compose.yml --output /var/lib/cyberway/docker-compose.yml
Tell docker-compose to update containers following the directions given in docker-compose.yml:
$ cd /var/lib/cyberway
$ sudo docker-compose up -t 120 –d