Avoid reindexing after compose down

[jaymc-betta]

I'm having trouble to avoid the reindexing process after doing docker compose down. The issue comes up when starting the project again, and the whole PBF_URL data gets pulled and indexed again. What am I missing?

services:
  postgis:
    image: postgis/postgis:15-3.3
    container_name: postgis_db
    restart: always
    environment:
      POSTGRES_USER: nominatim
      POSTGRES_PASSWORD: nominatim
      POSTGRES_DB: nominatim
    ports:
      - "5432:5432"
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U nominatim"]
      interval: 10s
      retries: 5
      start_period: 10s
    volumes: 
      - postgis_nominatim:/var/lib/postgresql/data

  nominatim:
    image: mediagis/nominatim:5.1
    container_name: nominatim
    depends_on:
      postgis:
        condition: service_healthy
    restart: always
    environment:
      PBF_URL: "https://download.geofabrik.de/south-america/argentina-latest.osm.pbf"
      POSTGRES_HOST: postgis
      POSTGRES_DB: nominatim
      POSTGRES_USER: nominatim
      POSTGRES_PASSWORD: nominatim
    ports:
      - "5050:5050"
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:5050"]
      interval: 30s
      retries: 5
      start_period: 30s

  db_initializer:
    image: postgis/postgis:15-3.3
    container_name: db_initializer
    depends_on:
      postgis:
        condition: service_healthy
    entrypoint: ["/bin/sh", "-c"]
    command:
      - |
        echo "Esperando a que PostgreSQL esté listo..."
        until pg_isready -h postgis -U nominatim; do
          sleep 2;
        done
        echo "PostgreSQL está listo. Creando base de datos..."
        PGPASSWORD=nominatim createdb -h postgis -U nominatim nominatim
        echo "Base de datos creada con éxito."
volumes:
  postgis_nominatim: