Configure SMTP in Docker container

You cannot. Only the official install is supported. See Can Discourse ship frequent Docker images that do not need to be bootstrapped?.

I helped someone with a K8s install last week. It took me and a couple of talented engineers over 6 hours (but it might have been 10,not counting the time they spent without me) to get it going using their tooling.

I’ve considered creating images that should be launched from a helm chart, but haven’t don’t it yet. If you have a budget, please contact me via pm or email and I might be able to help.