Doc request for Docker

Hi, thanks for the library. I am working with docker image and the readme is not enough to set it up for docker containers, as it gives errors all the time that connection is refused. Thanks in advance!

{
  "identifier": {
    "type": "dns",
    "value": "test.MYDOMAIN.com"
  },
  "status": "invalid",
  "expires": "2023-11-24T20:01:14Z",
  "challenges": [
    {
      "type": "http-01",
      "status": "invalid",
      "error": {
        "type": "urn:ietf:params:acme:error:connection",
        "detail": "165.227.94.87: Fetching http://test.MYDOMAIN.com/.well-known/acme-challenge/pJ1AeqaCnxtWCqPZEqkRMTjNct9pCGho1QnrYeKQl0o: Connection refused",
        "status": 400
      },
      "url": "https://acme-v02.api.letsencrypt.org/acme/chall-v3/284808795676/Px-9Og",
      "token": "pJ1AeqaCnxtWCqPZEqkRMTjNct9pCGho1QnrYeKQl0o",
      "validationRecord": [
        {
          "url": "http://test.MYDOMAINcom/.well-known/acme-challenge/pJ1AeqaCnxtWCqPZEqkRMTjNct9pCGho1QnrYeKQl0o",
          "hostname": "test.MYDOMAINcom",
          "port": "80",
          "addressesResolved": [
            "165.227.94.87"
          ],
          "addressUsed": "165.227.94.87"
        }
      ],
      "validated": "2023-11-17T20:01:15Z"
    }
  ]
}

@objectorientedperson docker works fine for me..., may I see your configuration?