Several things here :

• Remove the check on hashbang : it can be bash, or sh, ot anything else (reduce requirements is always good)
• use --force-recreate on docker-compose up, it removes the need of docker-compose down at the begining of run.sh, and reduce noise in output
• cgroup command: ignore if it fails (check will be done after)
• Add a check on each container, and display stdout if one has been unexpectably stopped