logging from file into stdio

docker-compose.yml

services:
  tail-from-file:
    image: busybox
    container_name: tail-from-file
    restart: unless-stopped
    volumes:
      - /var/log/system.log:/var/log/stream.log
    command:
      - tail
      - -f
      - /var/log/stream.log
    network_mode: none
    logging:
      driver: "fluentd"
      options:
        fluentd-address: 123.123.123.123:123
        tag: tag.access
        fluentd-async: 'true'