Support Static Gzip

[Luke Chastain]

It is nice to have the option to do computationally intensive compression during build time rather than leave files uncompressed and pass the buck to nginx. I wanted to open a pull request to turn nginx's gzip_static flag to on. Unfortunately, the distribution of nginx used by this buildpack does not include the gzip static module.

For reference:
http://nginx.org/en/docs/http/ngx_http_gzip_static_module.html

[Ed Morley]

Hi

This buildpack is now deprecated and we are recommending people move the more actively maintained heroku-buildpack-nginx. For migration advice see here.

As such, I'm closing this issue out since we won't be making further changes to this buildpack.