Issue with runner when overriding the entrypoint of an image

I'm trying to run a job in which I used opa image and I tried to override the entrypoint as following :

---
stages:
  - verify
check:
  stage: verify
  image:
    name: openpolicyagent/opa:0.16.2
    entrypoint: [""]
  script:  /opa run --server

However I'm getting error from the runner every time, this is a link for the failed job https://gitlab.com/abir4/test-opa-ci-pipeline/-/jobs/436873021 This is the docker file of the used image https://github.com/open-policy-agent/opa/blob/master/Dockerfile I think the reason is that in the image there's no installed shell so the runner cannot attach himself to the container am I right ?