DIB_IMAGE_CACHE will be a user override for the location where images are cached. Default location is ~/.cache/image-create Change-Id: I3e9b9f970864d555c9ec9436344b53f6d3d66dfa
Use Ubuntu cloud images as the baseline for built disk images.
Overrides:
- To use a non-default URL for downloading base Ubuntu cloud images, use the environment variable DIB_CLOUD_IMAGES
- To download a non-default release of Ubuntu cloud images, use the environment variable DIB_RELEASE