title: How can I use environmental variables on AWS Lambda?
body: <p>I'm writing an application which I want to run as an AWS Lambda function but also adhere to the Twelve-Factor app guidelines. In particular <a href="http://12factor.net/config">Part III. Config</a> which requires the use of environmental variables for configuration.</p>
  
  <p>However, I cannot find a way to set environmental variables for AWS Lambda instances. Can anyone point me in the right direction? </p>
  
  <p>If it isn't possible to use environmental variables can you please recommend a way to use environmental variables for local development and have them transformed to a valid configuration system that can be accessed using the application code in AWS.</p>
  
  <p>Thanks.</p>