Enable Brotli compression

[RicoFactset]

Hi,

Would you consider adding the Google Brotli extension for Nginx to the buildpack?

Reference: https://github.com/google/ngx_brotli

Serving brotli compressed files reduce transfer size for HTML, CSS, JS and SVG files better than with GZIP, but not JPG, PNG, WebP, GIFs etc. (binary files). So both (GZIP and Brotli) should be available.

Thank you!
Rico

[RicoFactset]

See also: heroku/heroku-buildpack-php#356

[ghusse]

I'm also interested!