mkdir /var/lib/docker/storage/rocketchat

docker run -d  --name rocketchat \
--restart always
-p 127.0.0.1:39520:3000 -v \
/var/lib/docker/storage/rocketchat:/app \
--env ROOT_URL=http://localhost \
--env MONGO_URL=mongodb://mymongourl/mydb \
rocket.chat