docker compose config --images daemon does not filter to the named service
on this host's Compose v5.3.1 -- it prints every service's image, one per
line, in file order, so `| head -1` was silently grabbing db's image
(timescaledb) instead of daemon's. The probe then always found no
/usr/local/bin/thermograph-daemon in a Postgres image and dropped daemon
from every backend deploy, regardless of what the real backend image
contained.
Fixed by building the image reference directly from the same vars
docker-compose.yml's daemon.image: already interpolates, instead of going
through docker compose config at all.
Reproduced against beta directly: the old sequence selected the wrong
image; the new construction resolves correctly and the binary probe
passes.
emi
979653f407