title: Cannot find module 'gulp'
body: <p>Greetings!
  Please i get this error when running ionic serve</p>
  
  <p><code>Error: Cannot find module 'gulp'</code>
  I don't know were the problem is.</p>
  
  <p>I installed the latest version of gulp and yet the error is still there.</p>
  
  <p>After running ionic serve, this is the error it shows</p>
  
  <pre><code>[v1] Error: Cannot find module 'gulp'
  [v1]     at Function.Module._resolveFilename (module.js:547:15)
  [v1]     at Function.Module._load (module.js:474:25)
  [v1]     at Module.require (module.js:596:17)
  [v1]     at require (internal/module.js:11:18)
  [v1]     at Object.&lt;anonymous&gt; (/home/gideon/Documents/IONIC/shoppingcart2/ionic-firebase-shopping-cart-master(copy)(copy)/gulpfile.js:1:74)
  [v1]     at Module._compile (module.js:652:30)
  [v1]     at Object.Module._extensions..js (module.js:663:10)
  [v1]     at Module.load (module.js:565:32)
  [v1]     at tryModuleLoad (module.js:505:12)
  [v1]     at Function.Module._load (module.js:497:3)
  </code></pre>
  
  <p>Please any solution to this error? Thanks in advance!</p>