Template app_config.yml

[CloudNiner]

This would allow further configuration of the proper app state when first brought up, including but not limited to:

• Comment out app_assets configuration so local assets are used by default
• Set proper hostnames/ports for other services

[CloudNiner]

App assets configuration templated in f73241d30dd1ac2abe54488bad5172de71f2f451

Still need to set hostnames based on ansible config.