:fire: Drop docker CLI install from lookit image
:fire: Drop docker CLI install from lookit image

Given that:
1) we leverage the Python docker client (rather than the
`docker` cli client) from the builder process,
and
2) the builder pod itself runs a DinD container (networked
locally by kubernetes) to run `dockerd`,

We do not actually need to install the docker CLI in the lookit image.

CenterForOpenScience/lookit-api,CenterForOpenScience/lookit-api,CenterForOpenScience/lookit-api