fix: set SvelteKit base path for /slide-maker prefix in staging

Author: smorello87

apps/web/svelte.config.js

@@ -5,7 +5,10 @@ import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
 const config = {
 	preprocess: vitePreprocess(),
 	kit: {
-		adapter: adapter()
+		adapter: adapter(),
+		paths: {
+			base: process.env.PUBLIC_URL?.includes('/slide-maker') ? '/slide-maker' : '',
+		},
 	}
 };