You might find this thread (and the blog post and course mentioned in it) of interest:
Dave doesn’t even use umbrella apps for them, preferring to just make each micro service a separate ‘normal’ Elixir app. I haven’t finished all the Elixir learning material I want to yet (got a few more books to go), but as of now I think I am going to be following Dave’s way of doing things as it just makes a lot of sense to me. If you haven’t got his course I highly recommend it.
