Runs core-image-builder service from a given service tarball (provided as files/core-image-builder.tgz).
This charm installs the core-image-builder service.
There is only one config option for this charm:
- config-file: A base64 encoded string with the config file to use for core-image-builder.
The charm expects the payload code to be provided as files/core-image-builder.tgz (a snapshot of lp:core-image-builder) along with its corresponding files/pip-cache directory (python dependencies).