Large caches left in image

[kouril]

The Docker image contains two large(r) cache directories:

699M /var/cache/salt
274M /root/.cache

these look like some installation artifacts, could they be removed from the image?

[lennyzeltser]

Thanks for noticing! In a VM, I prefer to keep /var/cache/salt untouched, because I think it aids with faster upgrades. However, I think people will be less likely to update the distro inside the container and will instead periodically refresh the container image from Docker Hub. I'll take a closer look at removing contents of both cache directories from the Docker image, as saving a GB of disk space sounds very nice.

[lennyzeltser]

Done. The updated REMnux image file is 1 GB less than before. Thanks, @kouril!