Serve Hound container to code.nasqueron.org

Summary:
By including _default.conf, we can provide a default configuration
without any fancy option to use host and app_port variables from pillar.

Ref T614

Test Plan: Browse https://code.nasqueron.org/

Reviewers: dereckson

Reviewed By: dereckson

Maniphest Tasks: T614

Differential Revision: https://devcentral.nasqueron.org/D2469