Current situation

One of the torcx profiles in Flatcar is for docker 1.12, which is outdated since a long time. It takes ~27 MB of space in production images almost for no reason.
We can and should delete docker 1.12.

In the past, we already tried to delete docker 1.12, but failed to do so because there were so many different places to be updated.
Not only torcx profiles, but also mantle tests.

In today's weekly meeting, we decided to try to delete docker 1.12 again, to make more free space in the /usr system partition.
Ideally it will be deleted from the next Alpha release in the next week.