Modified refractasnapshot to make a snapshot of a system other than the
one you're running. The snapshotted system only needs live-boot* and
live-config* packages installed. The refractasnapshot deps and the script
only need to be installed on the host system.

Works on a mounted filesystem or a directory where you did a debootstrap
install. It does not ask any questions - all variables are hard-coded, so
it can run automatically.

It assumes that you have refractasnapshot and its dependencies installed,
so it can use /usr/lib/refractasnapshot/iso as a source of files for the
isolinux directory in the live media. You can change that. Check the
variables in the head of the script before you run it.

Here's the script and the excludes list.
https://gist.github.com/fsmithred/87b68418207daf095efc6b3cd0aea05d
https://gist.github.com/fsmithred/9a4ee2b152f637f0fc6d3af269ca23ec

This should make the micro image even smaller and save you from removing
some packages at the end of the process. Feel free to adapt it to your needs.

-fsr