Añade red de gis-net para conectar con GeoServer

      postgres-vessel-net:

        aliases:

          - ais-db

      gis-net:

        aliases:

          - ais-db

    volumes:

      - vessel-postgres-vol:/var/lib/postgresql/data

networks:

  postgres-vessel-net:

    name: ${POSTGRES_NET_NAME:-postgres-vessel-net}

    attachable: true

  gis-net:

    name: ${GIS_NET_NAME:-gis-net}

    external: true

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