The Simplest Docker service

My first thought when wanting to run a docker container as a system service, was to use docker service. Like this

 docker service create --name nginx -p 80:80 \
    --mount type=bind,source=/var/www,destination=/usr/share/nginx/html \
    nginx

But this is sometimes an overkill. In case on nginx a much simpler solution would be

docker run --detach --network host \
    --restart=always \
    -v /var/www:/usr/share/nginx/html:ro \
    nginx

It’s the way to go, when you just what to have one instance on one specific host. The container will be started after system reboot - it will always start on docker daemon startup.
Just remember to enable docker on system boot with:

systemctl enable docker