title: Best way to "connect" two Docker Container without volume
body: <p>Currently, I have two containers <code>php-fpm</code> and NGINX where I run the PHP application.</p>
  
  <p>Now my question, is there a way to "connect" two docker containers without using a volume?
  Both containers need my application (NGINX to send static files e.g. <code>css/js</code> and <code>php-fpm</code> to interpret the PHP files).</p>
  
  <p>Currently, my application is cloned from git into my NGINX container and I had a volume so the <code>php-fpm</code> also had the files to interpret PHP.
  I search for a solution without that my application is on the host system.</p>