npm install config.env 
Suppose your upstart script is something like that
``
description "Simple upstart Script from my Node project"
start on started networking
stop on runlevel [016]
respawn
env MAIL_FROM='noreply@mail.com'
export MAIL_FROM
pre-start script
. /apps/myproject/.env
end script
script
exec /usr/bin/node /apps/simple.js
end script
`
The upstart section above is sourcing the /apps/myproject/.env file. this technique enable us to load the environment variables that will be used your application.
The same .env file from your application is used in the upstart/bash script.
/apps/myproject/.env
``
export NODE_ENV=production
export API_SECRET=1239012389084327897450-231
export VERBOSE=false
export MAIL_FORM='tdantas@email.com'
In the above snippet, MAIL_FROM was defined in the upstart script and in the configuration file [ /apps/myproject/.env ]. by default the bash.env will not override defined environment variables.
var source = require('bash.env');
source.load(); # will attach the .env variables to process.env
$3
#### #load
options: Object
path: [.env] The path to .env file.
override: [false] if false will not override pre defined environment variable.
loadTo: [process.env] object that will attach the definitions from config file
var obj = {};
source.load({ path: '/etc/app/config', override: true, loadTo: obj });
options: String
the path to .env file
source.load('/etc/app/config');