hydra: Container is not Running

I try to run a hydra container by using this command

docker run -d --name my-hydra -p 4444:4444 oryd/hydra

then try to exec shell from the container:

docker exec -i -t <container-id> /bin/bash

then i got following error:

Error response from daemon: Container 7e44b5470586470dc2284623c3bd2f466386136524486210d6495cff7ada1964 is not running