title: Iframe not working on heroku
body: <p>I have this code </p>
  
  <pre><code>  &lt;iframe src="http://matrix.crebtools.com/Matrix/public/IDX.aspx?idx=5a251ec" width="860px" height="520px"&gt;&lt;/iframe&gt;
  </code></pre>
  
  <p>It work locally but its not working on heroku 
  On heroku it shows white empty space</p>
  
  <p>so i put in application.rb this code but its still not working </p>
  
  <p>In applications.rb</p>
  
  <pre><code>module MohamedHatata
    class Application &lt; Rails::Application
  
      config.action_dispatch.default_headers = {
    'X-Frame-Options' =&gt; 'ALLOWALL'
  }
      # Settings in config/environments/* take precedence over those specified here.
      # Application configuration should go into files in config/initializers
      # -- all .rb files in that directory are automatically loaded.
      # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
      # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
      # config.time_zone = 'Central Time (US &amp; Canada)'
  
      # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
      # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
      # config.i18n.default_locale = :de
    end
  end
  </code></pre>
  
  <p>I spend two days just to try figure out the solution please any one help me </p>
  
  <p>This is my website
  <a href="https://mohamed-hatata.herokuapp.com/downsizes/new" rel="nofollow">https://mohamed-hatata.herokuapp.com/downsizes/new</a></p>