Regarding CI/CD pipeline. I found SemaphoreCI pretty nice. It supports Elixir/Erlang without the need for Docker and can deploy to Heroku pretty painlessly using the available buildpack. Got a full pipeline working for a Phoenix app going in about 30mins.
Yeah I started off using that exact pipeline and it worked well. We ended up moving to AWS which Semaphore only supports if its Elastic Beanstalk (could be different now to be fair). We couldn't go that route for more reasons than I care to list here. My hope is that Elixir gets popular enough that we can start to see some first class build tools integrated into more of these products.
