anchor.diff:                  
               Your project environment variable will be accessible via `process.env.CUSTOM_VAR_C`.
                   
  -            **- List Current Variables**
  +            **List Current Variables**
   
                   $ modulus env list
                   Project ExampleProject Environment Variables
  
positive.code: 
              ## Configure Environment variables
  
              **- Create an Environment variable**
  
                  $ modulus env set CUSTOM_VAR_C custom_value_3
                  Setting CUSTOM_VAR_C for project ExampleProject
  
negative.code:                 CUSTOM_VAR_A = custom_value
                  CUSTOM_VAR_B = custom_value_2
  
              **Delete an Environment variable**
  
                  modulus env delete CUSTOM_VAR_C            
  
              Learn more about [Environment variables](http://help.modulus.io/customer/en_us/portal/articles/1701180-using-environments-variables).
  
              ## Your MongoDB Database
                          
              You can add a MongoDB to your project with a simple command:
              
                  $ modulus addons add mongo:base
              
              This will create an ENV variable called `MONGO_URL`. You can use this with any node.js MongoDB client.
  
                  var MongoClient = require('mongodb').MongoClient;
  
  