copy filenames into documents on google drive

Code.gs

function copyTitles() {

  var folderId = '0Byvt4e0JQrRAMVR2Z0dnZnVhcDA';
  
  var folder = DriveApp.getFolderById(folderId);
  
  var files = folder.getFilesByType(MimeType.GOOGLE_DOCS);
  
  while(files.hasNext()) {
  
    var file = files.next();
    
    var fileId = file.getId();
    
    var fileName = file.getName();
    
    DocumentApp.openById(fileId).getBody()
      .insertParagraph(0, fileName)
      .setAlignment(DocumentApp.HorizontalAlignment.CENTER)
      .setHeading(DocumentApp.ParagraphHeading.HEADING1);
  
  }
}

can it be used to copy names of available forms in a folder to other doc file in the drive