Newer flowdalic/gentoo-dev images have ENTRYPIONT specified, this
prevents arguments from being passed to the docker run entrypoint,
which is tools/docker-prepare in case of docker.sh.

To fix that, we invoke "docker run" with "--entrypoint
tools/docker-preapre" in docker.sh.

Usage run "docker.sh <your command>" to execute <your command> in the
docker image extracted from .gitlab-ci.yml in the emper root directory

NOTE: seccomp filtering is disabled for now since io_uring_* syscalls
are not working everywhere as expected.