https://github.com/gaveen/dotfiles/blob/master/.config/fontconfig/fonts.conf

fonts.conf

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
  <match target="font">
    <edit mode="assign" name="autohint">
      <bool>true</bool>
    </edit>
  </match>
  <!-- Enable sub-pixel rendering -->
  <match target="font">
    <edit name="rgba" mode="assign">
      <const>rgb</const>
    </edit>
  </match>
  <!-- Enable hintstyle as hintslight -->
  <match target="font">
    <edit name="hintstyle" mode="assign">
      <const>hintslight</const>
    </edit>
  </match>
   <match target="font" >
     <edit mode="assign" name="antialias" >
       <bool>true</bool>
     </edit>
   </match>
   <match target="font">
     <edit mode="assign" name="lcdfilter">
       <const>lcddefault</const>
     </edit>
   </match>
</fontconfig>