By default, Django does not support serving static files in production. We recommend using the WhiteNoise project for best-practice serving of static assets in production.
why not STATICFILES_STORAGE ?
If set STATICFILES_STORAGE, whitenoise support gzip.
But It cause a problem. Cannot run unit test without collectstatic.
So, I didn't add STATICFILES_STORAGE to importd.
I think that appling whitenoise gzip or not is user's choice.
landscape-bot
commented
9 years ago 
Overview
If whitenoise is added to importd, it can run on heroku. https://importd-boilerplate.herokuapp.com/
https://devcenter.heroku.com/articles/django-assets
If set STATICFILES_STORAGE, whitenoise support gzip. But It cause a problem. Cannot run unit test without
collectstatic. So, I didn't addSTATICFILES_STORAGEto importd. I think that appling whitenoise gzip or not is user's choice.