title: gm conversion issue in node.js
body: <p>I am converting an image from jpg to png, but it is giving the error. Below is the code and error.</p>
  
  <pre><code>gm('E:/image1.jpg').write('E:/image2.png', function(err){
          if (err){
              console.log(err);
          } else{console.log('image converted.')}
      })
  </code></pre>
  
  <p>The error is:</p>
  
  <pre><code>[Error: Could not execute GraphicsMagick/ImageMagick: gm "convert" "E:/image1.jpg" "E:/image2.png" this most likely means the gm/convert binaries can't be found]
  </code></pre>
  
  <p>Do I have to npm graphicsmagick and imagemagick?</p>