Initial Data Load with Rails API + Ember

I'm currently using Ruby on Rails and EmberJS for a project. The Rails app is an ecommerce store and will need ~10 models to be loaded initially. I was thinking of using Gon to pass the models down as json on initial page load.

I'm thinking of using the ember cli to make one project, and, of course, ruby on rails to make the API.

If I make the application separate, how does one do initial data load? When it comes to deployment, how do you make sure that everything runs off of one rails server (thinking Heroku)?