Added project name on docker commands

setup/flavors/compose/setup.html

@@ -28,15 +28,15 @@ files before going any further.</p>
 
 {% call macros.panel("info", "Step 3 - Start the Compose project") %}
 <p>To start your compose project, simply run the Docker Compose <code>up</code>
-command.</p>
+command using <code>-p mailu</code> flag for project name.</p>
 
 <pre><code>cd {{ root }}
-docker-compose up -d
+docker-compose -p mailu up -d
 </pre></code>
 
 Before you can use Mailu, you must create the primary administrator user account. This should be {{ postmaster }}@{{ domain }}. Use the following command, changing PASSWORD to your liking:
 
-<pre><code>docker-compose exec admin python manage.py admin {{ postmaster }} {{ domain }} PASSWORD
+<pre><code>docker-compose -p mailu exec admin python manage.py admin {{ postmaster }} {{ domain }} PASSWORD
 </pre></code>
 
 <p>Login to the admin interface to change the password for a safe one, at