This repo will contain everything that is hard to figure out regarding phoenix, from docker deployments, through continuous integration to server instrumentation. Since this contains a lot of outside services, it can't be included in the official docs.
The idea behind this document is to have a standard way of doing things, so that everybody doesn't have to re-invent the wheel over and over again.
There is a great guide in the phoenix docs for heroku deployement
Kubernetes deployement
Here is a great reference for now
the caveat being that the deployed nodes aren't connected in the erlang sense
Cirlce CI offers a large free plan with 1500 minutes (for now at least)
Prometheus has a pretty good integration with phoenix, and is fairly easy to set up.