in docker-compose.yml

change

command: --key /dur/key/iris.key

to

command: --key /dur/key/iris.key -b "sleep 2000" 

so the container starts but IRIS is not started
2000 is just some hang for your investigation (2000 sec)

in a 2nd session run

docker-compose exec iris bash

and start IRIS manually to see all details of what might be wrong
 

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