Run command on stop/exit/remove codespace

[Pwd9000-ML]

I have a clean-up script that I want to run when my codespace stops/is removed. I tried to capture the exit signal /SIGTERM, this does not work unfortunately. Is there a feature such as postStartCommand that can be used but when a codespace is stopped instead? Something like preStopCommand? This would be very handy, or please advise what sort of exit code to capture e.g.:

#cleanup.sh
cleanup() {
    echo "cleanup..."
    #<Command>
}

trap 'cleanup; exit 130' INT
trap 'cleanup; exit 143' TERM

./cleanup.sh & wait $!

Relates to: <Codespaces | Remote - Containers | Both>

[bamurtaugh]

cc @joshspicer @edgonmsft @samruddhikhandale