curl --request GET \
  --url https://api.qovery.com/application/{applicationId}/customDomain \
  --header 'Authorization: Bearer <token>'

{
  "results": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "created_at": "2023-11-07T05:31:56Z",
      "domain": "my.domain.tld",
      "generate_certificate": true,
      "updated_at": "2023-11-07T05:31:56Z",
      "use_cdn": true,
      "validation_domain": "<string>",
      "status": "VALIDATION_PENDING"
    }
  ]
}