title: Display static image in public folder (rails 4)
body: <p>I have some images in the public folder, I obtain the url <code>/public/link/to/image.jpg</code> in my controller. I want to display it in my view, so I passed the url to the view. </p>
  
  <p>But how can I display it on the webpage? </p>
  
  <p>I searched through the post, most of them related to photos stored in assets folder, 
  whichi can be retrieved by <code>&lt;%= image_tag image-url (filename) %&gt;</code> in view.</p>
  
  <p>So how could I display image in public folder in view?</p>