title: NodeJS start mongoDB server
body: <p>I need to start the mongoDB server from my NodeJS application. I managed to do this before but for some reason I forgot how. I though I used a cild process but not sure anymore as I can't get anything to work at the moment.</p>
  
  <p>How would I start the mongoDB server (command mongod) from withing my NodeJS app and execute some other code when the server had been started (guessing using a promise...)?</p>