tar -czf tinyfilemanager-backup.tar.gz data/
Once you have customized the config.php , mount it into your container in your docker-compose.yml :
docker-compose up -d
backup: image: alpine container_name: tfm-backup volumes: - tinyfilemanager_config:/config:ro - /srv/data:/data:ro - ./backups:/backup command: sh -c "tar czf /backup/tfm-$(date +%%Y%%m%%d).tar.gz /config /data" restart: "no"