The following command starts a Redis container and configures it to always restart, unless the container is explicitly stopped, or the daemon restarts.

  docker run -d --restart unless-stopped redis

The following command changes the restart policy for an already running container named redis.

  docker update --restart unless-stopped redis

The following command ensures all running containers restart.

  docker update --restart unless-stopped $(docker ps -q)
  
Ref: https://docs.docker.com/engine/containers/start-containers-automatically/