How to store Node.js deployment settings/configuration files?

I have been working on a few Node apps, and I’ve been looking for a good pattern of storing deployment-related settings. In the Django world (where I come from), the common practise would be to have a file containing the standard settings (timezone, etc), and then a for deployment specific settings, ie. what database to talk to, what memcache socket, e-mail address for the admins and so on.

Reading settings from separate config file

My app has is using a web.config for common configuration. I also have a section that maps some data objects to connection strings, and that section is going to be couple thousand of lines. I want to move that section to another config file “dataMappings.config”, so I don’t bulk up web.config – is there a standard mechanism of accessing that config file?