Can't set cookies because app can't detect https?
I'm using Nginx to upstream certain api routes.
Since Nginx is where the https encryption takes place, Koa can't detect it?
So when attempting to set cookies, I get "cannot send secure cookie over encrypted connection"

I did find [this commit](https://github.com/pillarjs/cookies/commit/51006921f0d57fba18bad0313e392c9610852e8b) which seems to address this.
However, I can't figure out how to use it. 
