title: NodeJS - Get environment variables set using cmd
body: <p>I just wanted to know if there is any way to simply read environment variables I'vet set using SET in cmd. 
  I've read about process.env.[ENVVAR], but when I console.log the variable I've set in cmd, it shows undefined. 
  On other threads I read that it isn't even possible at all to access windows env. variables. 
  So what is actually right?</p>