There is usually no good reason to write to /dev. This however doesn't work in internal/app because FilesystemConfig supplied by ContainerConfig might add entries to /dev, so internal/app follows DevWritable with Remount instead.
Signed-off-by: Ophestra <cat@gensokyo.uk>
This does nothing for security, but should help avoid hiding bugs of programs developed in a hakurei container.
Signed-off-by: Ophestra <cat@gensokyo.uk>