title: start erlang/elixir on a defined interface ip address
body: <p>I'm using elixir to make some XMLRPC queries to an host on my machine that accepts only call from 127.0.x.y where x and y can be configurable but the ip can not be 127.0.0.1.</p>
  
  <p>Simple <code>curl</code> requests to this host would fail unless I add the flag <code>--interface 127.0.x.y</code>.</p>
  
  <p>How can I start my elixir application with a given interface ip different from 127.0.0.1?</p>
  
  <p>The library I use to send the request is HTTPoison if this can be helpful.</p>