Generate the fonts you need based on your url link. You can use this library for your CDN to generate your css fonts on the spot.
Run from your shell 'npm run start-default' or 'php -S 0.0.0.0:9000 router/router.php' then go to the url:
http://localhost:9000/?font-family=Roboto,OleoScript
font-family - Type your folders name that contains the fonts
list_fonts - Shows all existing fonts from your FONTS folder so you can use them with font-family parameter
available - Shows an output at the beginning of each generated font with all the font families found.
Create a file "default.genericfont" in your font folder and write your callback font into the file: cursive, fantasy, monospace, serif, sans-serif