I am fairly new to all this but am looking to populate an Apps Script Web App HTML dropdown form entry with names directly from a Google Spreadsheet. So far I have been able to
@HariDas has given a great answer with the back-end .gs code and is all working fine. Your web app code is also fine it just has a little change to be made:
var options = values[0];
//change it to:
var options = values;
This will now loop through the array and give all the results as seen here: Web App
Hope that helps :) Good luck!