Hi, fellow nginx users!

I started learning nginx this year and here is a small project I built using nginx as web server.
Marketplace for your expertise
http://expert.io

But I do have some question to ask if it is appropriate. As I am using nginx as the front end, it would sometimes show a 502 error which I have no idea what it is about.
The system is deployed with gunicorn + gevent.

Please leave any comment or suggestion!

Thank you for your time.

Cheers,

Justin