copr-fe-dev: open port 5000

This will allow us to run a testing web-server (without Apache and
wsgi), and e.g. trace using 'import pdb'.

inventory/group_vars/copr_front_dev_aws

@@ -30,6 +30,8 @@ letsencrypt:
 tcp_ports: [22, 80, 443,
     # node_exporter/prometheus
     9100,
+    # testing httpd server, `copr-frontend run`
+    5000,
 ]
 services_disabled: false