Move to Ubuntu 24.04 (#23)

* Move to Ubuntu 24.04

* Refactor the docker file for build/run stage

* Skip arm for now

* Fix up logging in the docker image

Fix error "flavor_names" is not defined (#21)

A previous commit stopped the collector working:
004077b

Add support for filtering public flavors (#20)

Try exclude disabled servers (#18)

Merge pull request #12 from stackhpc/skip_some_bits

Add ability to skip some bits