Traefik v2.2 with Cloudflare Wildcard

docker-compose.yaml

version: "3"

services:
  traefik:
    image: "traefik:v2.2"
    container_name: "traefik"
    command:
      # Globals
      - "--log.level=DEBUG"
      - "--api=true"
      - "--global.sendAnonymousUsage=false"
      # Docker
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--providers.docker.endpoint=unix:///var/run/docker.sock"
      # Entrypoints
      - "--entrypoints.web.address=:80"
      - "--entrypoints.websecure.address=:443"
      # LetsEncrypt
      - "--certificatesresolvers.mydnschallenge.acme.email=${CF_API_EMAIL}"
      - "--certificatesresolvers.mydnschallenge.acme.dnschallenge.provider=cloudflare"
      - "--certificatesresolvers.mydnschallenge.acme.storage=/etc/traefik/acme.json"
    ports:
      - "80:80"
      - "443:443"
    environment:
      - CF_API_EMAIL=${CF_API_EMAIL}
      - CF_API_KEY=${CF_API_KEY}
    volumes:
      - "/etc/traefik/acme.json:/etc/traefik/acme.json"
      - "/var/run/docker.sock:/var/run/docker.sock:ro"
    labels:
      # API
      - "traefik.enable=true"
      - "traefik.http.routers.traefik.rule=Host(`traefik.mydomain.fyi`)"
      - "traefik.http.services.traefik.loadbalancer.server.port=8080"
      - "traefik.http.services.traefik.loadbalancer.server.scheme=http"
      # Wildcard cert
      - "traefik.http.routers.traefik.tls.domains[0].main=mydomain.fyi"
      - "traefik.http.routers.traefik.tls.domains[0].sans=*.mydomain.fyi"
      - "traefik.http.routers.traefik.tls.certresolver=mydnschallenge"
      # Global http-->https
      - "traefik.http.routers.http-catchall.rule=hostregexp(`{host:[a-z-.]+}`)"
      - "traefik.http.routers.http-catchall.entrypoints=web"
      - "traefik.http.routers.http-catchall.middlewares=redirect-to-https"
      - "traefik.http.middlewares.redirect-to-https.redirectscheme.scheme=https"
      # BasicAuth Middleware
      - "traefik.http.middlewares.auth.basicauth.users=test:$$apr1$$H6uskkkW$$IgXLP6ewTrSuBkTrqE8wj/,test2:$$apr1$$d9hr9HBB$$4HxwgUir3HP4EsggP/QNo0"
      - "traefik.http.routers.traefik.middlewares=auth"
  whoami:
    image: "containous/whoami"
    container_name: "whoami"
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.whoami.rule=Host(`whoami.mydomain.fyi`)"
      - "traefik.http.routers.whoami.entrypoints=websecure"
      - "traefik.http.routers.whoami.tls.certresolver=mydnschallenge"
      - "traefik.http.routers.whoami.middlewares=auth"