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One of the wonderful things about Docker Containers is that you can easily freeze your environment and application in a Docker Image, and deploy it in production without worrying about installing dependencies on your servers. It just works. This is also great for debugging. If something doesn't work in production, you can run exactly the same image locally in matter of seconds.
Erlang/OTP 21.2 is the second service release for the 21st major release with, improvements as well as a few features!
OTP (Open Telecom Platform) provides rock solid foundations for building concurrent and fault-tolerant applications in Elixir. By building on top of GenServers and Supervision trees you not only get great performance, but also a modularized application. However, if you’re just starting to integrate Elixir into your stack your production infrastructure is probably not geared towards OTP applications out of the box.
Erlang 21.2 has a new feature called `persistent_term` this is a short introduction to the feature and how you can use it on your software.