Get last form response and call webhook

google_forms.js

function onFormSubmit(e) {
  var url = //TODO;
  var formId = //TODO;
  var form = FormApp.openById(formId);
  var formResponses = form.getResponses();
  var formResponse = formResponses[formResponses.length - 1];
  var itemResponses = formResponse.getItemResponses();
  
  var data = itemResponses.map(function(item) {
    return { id: item.getItem().getId(), text: item.getItem().getTitle(), response: item.getResponse()};
  });
   
  var options = {
    "method": "post",
    "headers": {
      "Content-Type": "application/json"
    },
    "payload": JSON.stringify(data)
  };
  var response = UrlFetchApp.fetch(url, options);
}