# Test-only overlay: publishes Mongo on loopback so host-run integration
# tests can reach it. Never used in normal deployment (§12 keeps Mongo
# unpublished):
#   docker compose -f docker-compose.yml -f docker-compose.test.yml up -d mongo
services:
  mongo:
    ports:
      - "127.0.0.1:27017:27017"
