Error when using run_command with a docker image

I am deploying a Rails app, including a dedicated work to run background jobs. I want to reuse the built Rails container and just change the run time command.

I was expecting the following configuration to work:

worker:
- name: resque
  image:
    registry_type: DOCR
    repository: <repository_name>
    tag: <tag_name>
  run_command: ./docker/scripts/resque.sh
  envs:
  - key: ENV_1
    value: Value_1
  ...

When I trigger a deployment it fails to run the migrations with the following error:

resque      | 12:23:25 starting container: starting non-root container [/cnb/lifecycle/launcher ./docker/scripts/resque.sh]: creating process: failed to load /cnb/lifecycle/launcher: no such file or directory

I have had to resort to having dedicated containers for the Rails app, Resque workers and migrations where the only difference is the runtime command

Any suggestions?