message: typeform webhook: add _ft_createdAt
diff: @@ -17,6 +17,7 @@ import * as functions from "firebase-functions";
  //const file = bucket.file('path/to/image.jpg');
  const typeformParser = (body) => ({
  + _ft_createdAt: body.form_response.submitted_at,
  ...body.form_response.hidden,
  ...body.form_response.answers.reduce((accRow, currAnswer) => {
  switch (currAnswer.type) {
  