SPA framework templates

[marcomuser]

I think it would be super useful to have an official template starter that bootstraps a simple SPA (in js or ts) in “framework mode” that is easily upgradeable to SSR if desired. Basically a template that bootstraps what is described in this guide: https://reactrouter.com/how-to/spa#single-page-app-spa. This way a new user doesn't have to deal with servers and all that stuff right away, but is already guided on the right path if the use case warrants it (..and I have to say there are more cases than the twitter bubble would have you believe where a SPA is preferred). Isn't that exactly one of the fantastic things about react-router's new version?

Originally posted by @marcomuser in #7 (comment)