code.gs

function doGet(e) {
  return HtmlService.createTemplateFromFile("form").evaluate()
  .setTitle("webpp_simple")
  .addMetaTag('viewport', 'width=device-width, initial-scale=1')
  .setXFrameOptionsMode(HtmlService.XFrameOptionsMode.ALLOWALL);
}

function setAutomatically(){

let ss = SpreadsheetApp.getActiveSpreadsheet();
let sheet = ss.getSheetByName('Data');
let val1 = sheet.getRange('A2').getValue();
let val2 = sheet.getRange('B2').getValue();
let val3 = sheet.getRange('C2').getValue();
let val4 = sheet.getRange('D2').getValue();
let val5 = sheet.getRange('E2').getValue();
let val6 = sheet.getRange('F2').getValue();

return [val1 , val2 , val3 , val4 , val5 , val6];

}