What is CustomConfig?
CustomConfig allows you to customize the configuration files used by your application's server components - in particular Nginx, HAProxy and our native database engines (MySQL, PostgreSQL, MongoDB, Redis etc).

Links:

• Using CustomConfig: https://help.cloud66.com/rails/tutorials/custom-config.html#accessing-customconfig
• Using CustomConfig Git: https://help.cloud66.com/rails/tutorials/custom-config-git.html
• cloud66.com