title: CarrierWave full url for default image
body: <p>I am using <a href="https://github.com/carrierwaveuploader/carrierwave" rel="noreferrer">CarrierWave</a> for image uploads on a <a href="https://github.com/rails-api/rails-api" rel="noreferrer">rails-api</a> application which in turn is consumed by a <code>backbone.js</code> client app. I notice that when there is no default image available it returns <code>/assets/default.png</code>. It in turn has to be <code>http://dev-server:3000/assets/default.png</code>. Here are my configuration settings:</p>
  
  <pre><code># config/environments/development.rb
  CarrierWave.configure do |config|
    config.asset_host = "http://dev-server:3000"
  end
  
  # Image Uploader
  ....
  
  def default_url
    "/assets/default.png"
  end
  </code></pre>
  
  <p>Where am I going wrong?</p>