Traefik bad gateway

Traefik Traefik v2 (latest)
1

It's my first expiriens with traefik 2. I use traefik with dashboard and without ssl in first step. I wanna see dashboard page in http and after that set tls. But i have "Bad Gateway" error after start traefik :frowning:

My logs:

docker logs traefik
time="2022-08-26T09:12:25+03:00" level=info msg="Configuration loaded from file: /traefik.yml"

docker-compose:

version: '3'
services:
  traefik:
    image: traefik:v2.8
    container_name: traefik
    restart: unless-stopped
    security_opt:
      - no-new-privileges:true
    ports:
      - 80:80
    volumes:
      - /etc/localtime:/etc/localtime:ro
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - ./data/traefik.yml:/traefik.yml:ro
      - ./ssl:/ssl
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.traefik.entrypoints=http"
      - "traefik.http.routers.traefik.rule=Host(`traefik.team-itonline.ru`)"
      - "traefik.http.services.traefik-traefik.loadbalancer.server.port=888"

./data/traefik.yml:

entryPoints:
  http:
    address: ":80"

http:
  routers:
    http-catchall:
      rule: hostregexp(`{host:.+}`)
      entrypoints:
      - http
providers:
  docker:
    endpoint: "unix:///var/run/docker.sock"
    exposedByDefault: false

api:
  dashboard: true

What is my mistake?

2

My browser console say: "traefik.team-itonline.ru/:1 Unchecked runtime.lastError: The message port closed before a response was received."

What port is a message port? I need open different port?