dotenv

Shim to load environment variables from .env into ENV in development.

Storing configuration in the environment is one of the tenets of a
twelve-factor app.  Anything that is likely to change between
deployment environments -- such as resource handles for databases or
credentials for external services -- should be extracted from the code
into environment variables.

But it is not always practical to set environment variables on development
machines or continuous integration servers where multiple projects are run.
dotenv loads variables from a .env file into ENV when the environment is
bootstrapped.

Homepage:
https://github.com/bkeepers/dotenv
