`node -` puts '-' in argv[1], so the registry snippets in add-instance.sh
and remove-instance.sh were one slot off: they wrote the registry to a file
named "-" in the working directory, with the instances.json path as the
instance name, a null port and the port as the db. scripts/instances.json
was never created, so the updater and start-all only ever knew instance 1 —
after an update, instance 2 and up kept running old code against the new
build until someone ran `pm2 restart all`.
Devices that already ran add-instance.sh need their scripts/instances.json
written by hand (and the stray "-" file deleted).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
