title: Laravel echo server killed on exit console
body: <p>i'm using laravel-echo-server and all works fine, if i launch server with this command:</p>
  
  <pre><code>laravel-echo-server start
  </code></pre>
  
  <p>i see:</p>
  
  <p>L A R A V E L  E C H O  S E R V E R</p>
  
  <p>version 1.2.8</p>
  
  <pre><code>Starting server...
  
  ✔  Running at localhost on port 3001
  ✔  Channels are ready.
  ✔  Listening for http events...
  ✔  Listening for redis events...
  
  Server ready!
  </code></pre>
  
  <p>But if i close with ctrl+c the server has been killed! the same things if i use this command:</p>
  
  <pre><code>laravel-echo-server start &amp;
  </code></pre>
  
  <p>if i disconnect my ssh connection, the server stop work!</p>
  
  <p>How can i launch in background mode?</p>
  
  <p>thanks!</p>