Set the custom domain

{
  "hostname": "<string>",
  "target": "<string>",
  "txtName": "<string>",
  "txtValue": "<string>",
  "records": [
    {
      "type": "A",
      "name": "<string>",
      "value": "<string>"
    }
  ],
  "verified": true,
  "lastCheckedAt": "2026-08-10T12:00:00Z"
}

{
  "defined": true,
  "code": "INVALID_DOMAIN",
  "status": 400,
  "message": "Enter a domain such as resume.example.com.",
  "data": null
}

{
  "defined": true,
  "code": "PRECONDITION_FAILED",
  "status": 412,
  "message": "Custom domains aren't set up on this server.",
  "data": null
}

{
  "defined": true,
  "code": "<string>",
  "status": 1,
  "message": "<string>",
  "data": null
}