I think you need a js engine to run the entire thing which entails shipping that with the product to make it "locally installable". Then you get into complex version dependencies and require support for upgrading and upgrade paths... yarn is pretty straightforward and so are docker containers.
Haven't looked into the technical details of it, but it seems like this should be as simple as slapping it inside of electron to have a fully local and cross platform install.
Yes, that would solve the javascript interpreter aspect, but then you need to provide update services and updaters to customers, logic to update, an installer, support for said installer, testing for breaking changes to updates... It's more complicated than just bundling the code in a static wrapper.
