Fix container name read out for docker
Fix container name read out for docker

Docker-compose changed their naming behavior for the containers
in version 1.23 (Way to go for a minor release). This
fix will read the correct container name with the slug and use
it for our commands.

More information: https://github.com/docker/compose/issues/6316

Goldinteractive/Sackmesser,Goldinteractive/Sackmesser,Goldinteractive/Sackmesser,Goldinteractive/Sackmesser