Restart hook for docker containers

[Simon Szustkowski]

I am currently migrating to docker. I use acmetool to obtain SSL certificates for mosquitto which is currently natively installed, and restarted via an acmetool systemd hook. Now i want to migrate mosquitto to a docker container, and use it with an acmetool created SSL certificate as well, which is mountable into the container. However, i am still missing a restart hook which restarts the container after renewing the certificate. How can i do this?