Summary
I'm only receiving 502 errors from nginx when hitting my site, even directly from the IP address.
Steps to reproduce
Install docker, docker-compose, and mattermost from scratch on brand-new CentOS 7 installation and attempt to access the application. No modifications to docker-compose.yml, no SSL, no email.
Expected behavior
I expected to see a sign up page.
Observed behavior
Receiving 502 response after clean install.docker ps shows the web process is listening on port 80.