title: Getting values from a config file or environment variable in meteor
body: <p>This would be very useful for storing API keys or other sensitive information. From what I understand, you can use config files locally but they won't work on meteor.com, but I heard a rumor that environment variables were soon to be supported, or are already as of a recent release, but I can't find any examples.</p>
  
  <p>Can someone provide an example of how to retrieve a value from an environment variable or some other safe location?</p>