docker compose down is not needed, and running it before pulling updated
images causes longer service downtime than required.
Simply running `docker compose up -d` after `docker compose pull` will
recreate all containers that changed (by either image version or other
settings in the compose file).
Hey, since I've been using Actual via Traefik for a few days now, I took
the time to add a little bit to the documentation in that regard. I hope
it fits so far. Please feel free to comment/improve anything.
