Review cron job for clearing docker cache

There are cron jobs in that container that are supposed to clear the docker cache periodically but some files are being kept and I don't know how/why it is happening. Dropping the pod once every two months is not the most elegant way to handle this.

We (you) could look at a better approach to clear the Docker cache than my cron job implementation. Or maybe we can remount the storage to the slow drive (lots of space there) instead of the local node's SSD.