Hi,
I'm following this guide to install on AWS
http://docs.mattermost.com/install/docker-ebs.html
It is slightly different order but everything seems done correctly, and it launches with green health check. Howvever, I get a 502 Bad Gateway on access.
e.g http://mattermost-1.7fhp9npkby.ap-southeast-1.elasticbeanstalk.com/