How can I use Ruby on Rails and Knockout.js in data-bind?

I currently have following codes

<code data-bind="text: xxx, highlightable: true"></code>

And I want to bind something like App::Application::CONFIGURATION[:url] into text of the data-bind

I tried <code data-bind="text: <%=App::Application::CONFIGURATION[:url] %>, highlightable: true"></code> but it didn't work.

Hope that someone can help me solve this problem. I appreciate your help!