Rancher 2.6 traefik and docker-compose with let's encrypt namecheap DNS-01 challenge

docker-compose.yml

version: "3.3"

services:

  traefik:
    image: "traefik:v2.9"
    container_name: "traefik"
    command:
      - "--log.level=DEBUG"
      - "--api.insecure=true"
      - "--providers.docker=true"
      - "--providers.docker.exposedbydefault=false"
      - "--entrypoints.web.address=:80"
      - "--entrypoints.websecure.address=:443"
      - "--certificatesresolvers.myresolver.acme.dnschallenge=true"
      - "--certificatesresolvers.myresolver.acme.dnschallenge.provider=namecheap"
      - "--certificatesresolvers.myresolver.acme.dnschallenge.resolvers=dns1.registrar-servers.com:53,dns2.registrar-servers.com:53"
      #- "--certificatesresolvers.myresolver.acme.caserver=https://acme-staging-v02.api.letsencrypt.org/directory"
      - "--certificatesresolvers.myresolver.acme.email=postmaster@example.com"
      - "--certificatesresolvers.myresolver.acme.storage=/letsencrypt/acme.json"
      - "--global.sendAnonymousUsage=false"
      - "--serverstransport.insecureskipverify=true"
    restart: always
      
    ports:
      - "31080:80"
      - "31443:443"
      - "38080:8080"
    environment:
            - "NAMECHEAP_API_KEY=YOURAPIKEY"
            - "NAMECHEAP_API_USER=YOURUSERNAME"
    volumes:
      - "./letsencrypt:/letsencrypt"
      - "/var/run/docker.sock:/var/run/docker.sock:ro"

  whoami:
    image: "traefik/whoami"
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.whoami.rule=Host(`yourdomainwhoami.example.com`)"
      - "traefik.http.routers.whoami.entrypoints=websecure"
      - "traefik.http.routers.whoami.tls.certresolver=myresolver"
     profiles:
      - donotstart

  rancher:
    image: rancher/rancher:stable
    command:  --no-cacerts
    #command: --acme-domain yourdomainrancher.example.com
    privileged: true
    environment:
        - "AUDIT_LEVEL=1"
    volumes:
        - "./local/mysql:/var/lib/mysql"
        - "./local/auditlog:/var/log/auditlog"
        - "./local/rancher:/var/lib/rancher"
    expose:
      - 80
      - 443
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.rancher.rule=Host(`yourdomainrancher.example.com`)"
      - "traefik.http.services.rancher.loadbalancer.server.port=443"
      - "traefik.http.services.rancher.loadbalancer.server.scheme=https"
      - "traefik.http.services.rancher.loadbalancer.passhostheader=true"
      - "traefik.http.routers.rancher.entrypoints=websecure"
      - "traefik.http.routers.rancher.tls.certresolver=myresolver"
      - "traefik.http.middlewares.rancher-behind-proxy.headers.customrequestheaders.X-Forwarded-Proto=https"
      - "traefik.http.routers.rancher.middlewares=rancher-behind-proxy"
     restart: always

Then docker compose up, wait, and go to https://yourdomainrancher.example.com:31443