Ah this is also in general my preferred way of starting. It is just that now I feel that SPA is a different space than SSR and I think the different might be too big just to start off a project.

I did this with Elixir/Phoenix but somehow even if they are a different programming language some things were common with Ruby on Rails. With SPA I feel (as I don't know for sure) that it is too different than SSR.