How to make data on datatables ascending?

Hi I am using Laravel 5 and I want to display data on my datatables is ascending depends on "tanggal_publish" field on the database. I don't want to show "tanggal_publish in my table. Do you know how to do it?

Here is my javascript:

$(document).ready(function(){
    $('#surat').DataTable({
       ajax: {
          url: '{!! route("datasurat") !!}',
          dataSrc:''
       },
       columns : ['no','jenis_surat','nomor_surat','perihal','status','']
   });
 });

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