docker-compose/adminer/docker-compose.yml

services:
  adminer:
    container_name: adminer
    image: docker.io/library/adminer:5.3.0
    restart: unless-stopped
    labels:
      - traefik.enable=true
      - traefik.http.routers.adminer.rule=Host(`${TRAEFIK_DOMAIN}`)
      - traefik.http.routers.adminer.entrypoints=${TRAEFIK_ENTRYPOINT}
      - traefik.http.services.adminer.loadbalancer.server.port=8080
    ports:
      - ${PORT}:8080
    networks:
      - frontend

networks:
  frontend:
    external: true