services:
  db:
    image: postgis/postgis:18-3.6
    environment:
      POSTGRES_USER: gazetteer
      POSTGRES_PASSWORD: gazetteer
      POSTGRES_DB: gazetteer
    # Modest memory settings on purpose: the project trades disk for RAM.
    command:
      - postgres
      - -c
      - shared_buffers=256MB
      - -c
      - work_mem=32MB
      - -c
      - maintenance_work_mem=256MB
      - -c
      - max_wal_size=2GB
    ports:
      - "5433:5432"
    volumes:
      - gazetteer-db:/var/lib/postgresql
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U gazetteer -d gazetteer"]
      interval: 5s
      timeout: 3s
      retries: 12

volumes:
  gazetteer-db: