Eventually, images should not be transferred as part of the application package,
using a more efficient mechanism instead. Other cases may already exist where
packaging without the image is preferrable.
When the `PACKAGE_IMAGES` variable is not set to 1 (default: 1), images will not
be included in the package. The installation script now handles the case where
the `images` folder is missing altogether.
the package format was slightly off - there should have been a folder in the
root of the archive wrapping the package contents. This is now implemented.
The packaging script will create a new tar.bz2 archive containing an install
script, a set of docker images, and a root folder with files to be installed.
The root folder includes a systemd service, a docker compose file, an entry
script, and a template config file.
On installation docker images are loaded onto the target system, install files
are copied, then systemd services are installed.
alec.turner