[FEAT] Add Docker tmpfs Mount about flux HOT 1 OPEN

The solution I provided above would allow a user to create their app in a way that only would use the temporary RAMDISK directory that would be constructed as a result of starting the Docker container with either of those flags specified in the link I gave you.

Another option that I tested today that eliminates the ability to access any of the docker containers from a disk and only store those files in RAM is to run this command: mount -t tmpfs -o size=1024m tmpfs /var/lib/docker

The size parameter would need to specified accordingly. Though not sure how it would be able to be implemented in Flux

EDIT: This seems to be very interesting and would (I think) accomplish the same type of behavior.

(First Comment)
moby/moby#41110

(Edits that were made to accomplish)
moby/moby@master...Jongy:moby:overlayfs-upperdir-tmpfs

from flux.