What I missed in the docs: Is there some out of the box deploy target? Ink has a web export for example, so if that's all you need you don't need to deal with any middleware aspects and simply write your game, export for web and get the interface for free, basically.
I like how in the example gif, barista.name is set in the "Your name is Alex, right" block, implying that the barista didn't have a name/didn't know their name until after being prompted.