title: How to Log something in Controller when Phoenix Server is running?
body: <p>I'm trying to print some debug information from one of my Controllers in my Phoenix app when the server is running.</p>
  
  <pre class="lang-ex prettyprint-override"><code>defmodule PhoenixApp.TopicController do
    use PhoenixApp.Web, :controller
  
    def index(conn, _params) do
      log("this text")
  
      # ... 
    end
  end
  </code></pre>