Google doc as html content dynamically

gscript.gs

function doGet(e){
  let id = '1fK1zbSNw7jZuEB14iS8n6t9p7PV4tFQW8fJpnJMpFWA';
  if('id' in e.parameter){
    id = e.parameter['id']
  }
  let html = '<h1>Laurence Svekis</h1>';
  const url = 'https://docs.google.com/feeds/download/documents/export/Export?id='+id+'&exportFormat=html';
  const param = {
    method :"get",
    headers : {
      "Authorization":"Bearer "+ScriptApp.getOAuthToken()
    },
    muteHttpExceptions:true
  };
  html = UrlFetchApp.fetch(url,param).getContentText();
  return HtmlService.createHtmlOutput(html);
}

function testHTML(){
  const id = '1Ypgk3FCRN-s70jvWwKKEUll7zIfTY';
  const url = 'https://docs.google.com/feeds/download/documents/export/Export?id='+id+'&exportFormat=html';
  const param = {
    method :"get",
    headers : {
      "Authorization":"Bearer "+ScriptApp.getOAuthToken()
    },
    muteHttpExceptions:true
  };
  html = UrlFetchApp.fetch(url,param).getContentText();
  Logger.log(html);
}