added pwa plugin

src/routes/+layout.js

@@ -1,2 +1,3 @@
 export const ssr = false;
+export const csr = true;
 export const prerender = true;

vite.config.js

@@ -1,7 +1,8 @@
 import { purgeCss } from 'vite-plugin-tailwind-purgecss';
 import { sveltekit } from '@sveltejs/kit/vite';
 import { defineConfig } from 'vite';
+import { SvelteKitPWA } from '@vite-pwa/sveltekit';
 
 export default defineConfig({
-	plugins: [sveltekit(), purgeCss()]
+	plugins: [sveltekit(), purgeCss(), SvelteKitPWA()]
 });