title: User friendly method to input HTML email from appscript
body: <p>I created a sheets where my team (with zero knowledge on Google Apps Script and HTML) fills with Customer Names and Customer Email Addresses and click on a button to execute my script.</p>
  <p>I made a script where I retrieve those names and emails and send them a HTML-formatted email, all through App Script.</p>
  <p>However, the email body keeps changing and 1) I don't have the time to keep change it on the HMTL page inside Apps scrip; and 2) My team don't know how to change it.</p>
  <p>I imagine there's an easier way for them to input the email body they want, and then my function retrieves it and use it in the email.
  One extra problem: on my script, I call variables to use on the html (like Customer Name).</p>
  <p>Any thoughts?</p>
  <p>(sorry for the long question)</p>