Appending multiple rows in one doc - google-apps-script

Question

I'm trying to automate filling up tables in doc with data from sheets. I created code which creates doc for each row. Now I'd like to upgrade it a bit, so it creates only one file and appends a new table for each row from the sheet. I'm struggling with looping through the data and adding data to the same file.
function onOpen() {
const ui = SpreadsheetApp.getUi();
const menu = ui.createMenu('Wygeneruj tabele');
menu.addItem('Nowa tabela', 'createNewGoogleDocs');
menu.addToUi();
}
function createNewGoogleDocs() {
const googleDocTemplate = DriveApp.getFileById('file id');
const destinationFolder = DriveApp.getFolderById('folder id');
const sheet = SpreadsheetApp.getActiveSpreadsheet();
const rows = sheet.getDataRange().getValues();
rows.forEach(function(row, index) {
if (index === 0) return;
if (index === 1) return;
if (row[34]) return;
const ss = sheet.getRange('A3').getValue();
const copy = googleDocTemplate.makeCopy((ss), destinationFolder);
const doc = DocumentApp.openById(copy.getId());
const body = doc.getBody();
body.replaceText('{{Name}}', row[1]);
body.replaceText('{{Date}}', row[2]);
body.replaceText('{{Data}}', row[3]);
rows.forEach(function(row,index) {
let final = copy.appendRow(body)
})
doc.saveAndClose();
const url = doc.getUrl();
sheet.getRange('AI3').setValue(url);
})
}