Install reqs and release Elixir/Phoenix app, Ubuntu 16.04

phoenix_release.md

vagrant init ubuntu/xenial64  
vagrant up  
vagrant ssh  
echo 'deb https://packages.erlang-solutions.com/debian xenial contrib' | sudo tee -a  /etc/apt/sources.list  
wget -qO - https://packages.erlang-solutions.com/ubuntu/erlang_solutions.asc | sudo apt-key add -  
sudo apt update  
sudo apt install esl-erlang elixir  
mix local.hex  
mix archive.install https://github.com/phoenixframework/archives/raw/master/phoenix_new.ez  
mix phoenix.new web --no-brunch --no-ecto

Add {:exrm, "~> 1.0"} to deps list in mix.exs

mix deps.get  
MIX_ENV=prod mix compile  
MIX_ENV=prod mix release