title: Can't get to localhost:3000 and welcome to express
body: <p>I have just started learning node.js and I have been following <a href="http://cwbuecheler.com/web/tutorials/2013/node-express-mongo/" rel="nofollow noreferrer">this</a> tutorial.
  I did all the things mentioned there but when I write <code>npm start</code> on the cmd I couldn't go to the "welcome to express" page. I have attached the screenshot with the errors I am getting.</p>
  
  <p>I googled a lot of things but couldn't find an answer.</p>
  
  <p>here are the screenshots:
  <img src="https://i.stack.imgur.com/YaCIv.png" alt="screenshots"></p>
  
  <p>P.s. ->(If this is worth mentioning) I also executed <code>npm install mysql</code> (from some other tutorial since I wanted to use mysql) instead of mongodb written in the linked tutorial.</p>