check process docker with pidfile /var/vcap/sys/run/docker/pid
  group vcap
  start program "/var/vcap/jobs/docker/bin/ctl start"
  stop program "/var/vcap/jobs/docker/bin/ctl stop" with timeout 60 seconds
  if failed unixsocket /var/vcap/sys/run/docker/docker.sock with timeout 5 seconds for 5 cycles then restart
