With the runner in host-mode, compose bind-mount paths resolve to
real host paths the Docker daemon can see, so the GeoIP file no
longer needs to be baked into the backend image to survive CI. Bring
back the bind-mount of `pkg/geoip/test-data/.../mmdb`, matching how
local-dev sources it. Image now only carries the backend binary,
symmetric with the production `backend/Dockerfile`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Ilia Denisov
bb74e3336e