traefik.yml

tls:
  stores:
    default:
      defaultCertificate:
        certFile: path/to/cert0.pem
        keyFile: path/to/cert0.key
  certificates:
    - certFile: path/to/cert1.pem
      keyFile: path/to/cert1.key
    - certFile: path/to/cert2.pem
      keyFile: path/to/cert2.key
    - certFile: path/to/cert3.pem
      keyFile: path/to/cert3.key

certificatesResolvers:
  le:
    acme:
      email: ''
      storage: '/etc/letsencrypt/treafik-acme.json'
      httpChallenge:
        entryPoint: web

providers:
  file:
    directory: /etc/traefik/config
    watch: true
  docker:
    endpoint: "unix:///var/run/docker.sock"
    swarmMode: true
    exposedByDefault: false
    watch: true