Configure ports.conf to allow bind on non-80 port
diff --git a/horizon/conf/ports.conf b/horizon/conf/ports.conf
index 3adc8ac..3b7254e 100644
--- a/horizon/conf/ports.conf
+++ b/horizon/conf/ports.conf
@@ -3,7 +3,7 @@
 # have to change the VirtualHost statement in
 # /etc/apache2/sites-enabled/000-default.conf
 
-Listen {{ server.bind.address }}:80
+Listen {{ server.bind.address }}:{{ server.bind.port }}
 
 <IfModule ssl_module>
         Listen {{ server.bind.address }}:443