Real failure on the server after #47 merged: the old GID-resolution
code ran (found the old COMFYUI_VIDEO_GID/COMFYUI_RENDER_GID vars
"already set"), then git pull swapped every file on disk out from
under the still-running script — including docker-compose.yml, now
requiring HOST_VIDEO_GID/HOST_RENDER_GID — but the resolution step
that would populate those had already run under the old code and
never re-ran. compose validation then failed on the new required
vars that were never set.
A self-updating script isn't atomic against its own file changing
mid-run. Move git pull to the very first thing the script does, so
every run is consistently either fully old or fully new code, never
a mix.
bash -n and docker compose config -q both validated.
haylan