anchor.diff:  
   ### <a id="environment-variable-node-env"></a> NODE_ENV
   
  -The `NODE_ENV` environment variable specifies which environment the application is running in.
  +The `NODE_ENV` environment variable specifies the environment in which the app runs.
   
   * Set by: `node-engine-cnb`
   * Phases: `build`
  
positive.code: 
  ### <a id="environment-variable-path"></a> PATH
  
  The `PATH` environment variable appends the `node_modules/.bin` directory onto the `$PATH`.
  
  * Set by: `yarn-cnb`
  * Phases: `build`
  
negative.code: * Phases: `build`
  * Value: "error"
  
  ### <a id="environment-variable-npm-config-production"></a> NPM_CONFIG_PRODUCTION
  
  The `NPM_CONFIG_PRODUCTION` environment variable installs only production dependencies if NPM install is used.
  
  