Enable compress-responses / mod_deflate

Hey,

I'm using grahamdumpleton/mod-wsgi-docker:python-2.7-onbuild for my Django app and I'm trying to compress my response (I could do it in application level but I read that it's a bad practice )
Maybe I'm missing something but I couldn't find any place that shows how to turn on the compress-responses or mod_deflate.

Thanks.