How to pass dependencies to the client app?

[christian-schlichtherle]

I think the README.md or even the sample code should address how to pass dependencies to the client app. For example, I have a few configuration parameters that I need to pass down to the client app. I could provide them as argument to the main client app, but how would it be done? I would normally pass them down as Twirl template parameters, but I don't see how to do this when calling scalajs.html.scripts(...).