Replace build system

[foodelevator]

The build system used here has now gotten quite old and could use a refresh. Having to use node version 10 isn't very fun and I've been trying to run npm install with npm version 6.14.12 but haven't gotten anywhere ;(

I think that most of the client side code would still work in modern react (correct me if I'm wrong) and the only interesting line of the server side code seems to be
https://github.com/datasektionen/bawang/blob/1a2aee8c3d8790c75b0d12a94f76118fbbd3ee14/src/server.js#L33C3-L33C76
which should be possible to implement directly in nginx.

I've heard good things about vite, but don't know too much about react and what's nice to use.

[foodelevator]

I have looked around a bit and if we want to still have both server rendering and client side routing like now, we can probably use Next.js or something called Vike (built on vite), with which you can enable client side routing like in this example.

We could also give up on server rendering, in which case we could use some vite + react template. I do however think that it would be "kinda meh" to have a website without any interactivity that doesn't even render without javascript.

We could also give up on client side routing and only server side render (which would re-fetch the whole website when you click any link) and in that case perhaps astro would be the nicest?
We could also use Astro (in which you can have React components) and use the new view transitions api. It's very new and so far only exists in chromium but Astro allows you to either use their built in JS-based fake view transitions or full page reloads as a fallback, so I don't think that is problematic even as a die hard firefox user myself :)