traefik-2.2-docker-compose.yml

version: '3'

services:
  traefik:
    image: traefik:v2.2
    container_name: traefik
    restart: unless-stopped
    security_opt:
      - no-new-privileges:true
    networks:
      - proxy
    ports:
      - 80:80
      - 443:443
    environment:
      - CF_API_EMAIL=your-cloudflare@email.com
      - CF_API_KEY=your-cloudflare-api-key
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ./data/traefik.yml:/traefik.yml:ro
      - ./data/acme.json:/acme.json
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.traefik.entrypoints=https"
      - "traefik.http.routers.traefik.rule=Host(`traefik.example.com`)"
      - "traefik.http.middlewares.traefik-auth.basicauth.users=USER:PASSWORD"
      - "traefik.http.routers.traefik.middlewares=traefik-auth"
      - "traefik.http.routers.traefik.service=api@internal"

networks:
  proxy:
    external: true

Thanks for the guide. I think config file volume is missing on line 23

volumes:
  - /etc/localtime:/etc/localtime:ro
  - /var/run/docker.sock:/var/run/docker.sock:ro
  - ./data/traefik.yml:/traefik.yml:ro
  - ./data/acme.json:/acme.json
  - ./data/config.yml:/config.yml