Add CLC to the docker images by default

CLC has useful commands such as `clc script run` for local development.

Start by locating the Docker image definitions and their dependency installation steps in the repository. Check how the existing images are built, then determine where CLC should be added and verify that the resulting image provides the requested command. The issue does not name a file or test, so the relevant build entry point must first be identified.

Written by the indexing model from the issue text.