Serving gziped files on Heroku

I'm trying to add compression for js/css/images on my Laravel app that I'm hosting with Heroku

I've googled this for about half an hour now and I've found two things:

• Heroku does not proxy with nginx servers (https://devcenter.heroku.com/articles/http-routing#gzipped-responses) so I don't think changing my nginx.conf file is any help here (a la https://mattstauffer.co/blog/enabling-gzip-on-nginx-servers-including-laravel-forge)
• There is a ruby gem for rails apps hosted on heroku that seems to solve this problem for rails devs. (https://github.com/romanbsd/heroku-deflater)

Is there a similar package for Laravel projects hosted on heroku to enable compression? Or is it possible to pre-compress the files and serve the compressed versions to the broswer?

Thanks!