server/frontend/ui/svelte.config.js

/** @type {import('@sveltejs/kit').Config} */
import adapt from '@sveltejs/adapter-static';

const config = {
	kit: {
		adapter: adapt({
			fallback: 'index.html'
		}),
		paths: {
			// base: '/2021',
		},

		// hydrate the <div id="svelte"> element in src/app.html
		target: '#svelte'
	}
};

export default config;