Apptainer: Dockerfile WORKDIR ignored; WORKDIR != APPTAINER_WORKDIR

[willfurnass]

• Dockerfile WORKDIR: pwd inside container when launched
• APPTAINER_WORKDIR, -W somestring, --workdir somestring: confusingly, working directory to be used for /tmp, /var/tmp and $HOME (if -c/--contain was also used)
• Apptainer users need to specify APPTAINER_PWD=somestring or --pwd somestring at container launch time to control pwd inside containers.