Vite 5: Returns 200 OK instead of 404 Not Found

[melloware]

Vite 5 now fails because by default appType: 'spa' does not return 404's if something isn't found and returns 200 and sends to index HTML bypassing the SPARouting.

https://vitejs.dev/config/shared-options#apptype

To fix it we need to tell vite this is a MultiPageApplication using appType: 'mpa' to make it work like Vite 4 with Quinoa.

import react from "@vitejs/plugin-react";
import { defineConfig } from "vite";
import eslint from "vite-plugin-eslint";

// https://vitejs.dev/config/
export default defineConfig({
	plugins: [react(), eslint()],
	appType: "mpa",
});

[melloware]

OK attached is a reproducer:
vite5-project.zip

Run mvn quarkus:dev and then go to DevUI Swagger and just try and hit the "/hello" REST service you will see it returns the HTML of the Vite webapp with a 200 OK.

Now go into vite.config.ts and change appType: "spa" to appType: "mpa" and repeat above the RestEasy /hello API works fine again as does the webapp.