this solution really helped me thanks

Environment Variable FONTCONFIG_PATH: /var/task/assets/fonts

fonts.conf inside /var/task/assets/

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
   <dir>/var/task/assets/fonts/</dir>
   <cachedir>/tmp/fonts-cache/</cachedir>
   <config></config>
</fontconfig>