When `auto_devops` is enabled, the workhorse host should be 0.0.0.0

This issue is similar to !762 (merged)

Problem

When auto_devops is enabled. The Procfile is configuring workhorse to listen to $host:3333. As $host is actually the internet facing domain (e.g. 23233.gitlab-tunnel.info), this means workhorse fails to bind to that host.

Workaround

Manually edit the Procfile line for workhorse, change $host to 0.0.0.0.

Possible Fix

Make something similar for workhorse's host similar to !762 (merged)

See also

#566 (comment 209575401)

Edited by Thong Kuah