add vite-plugin-pwa

vite.config.js

@@ -1,11 +1,15 @@
-import { fileURLToPath, URL } from 'node:url'
+import { fileURLToPath, URL } from 'node:url';
 
-import { defineConfig } from 'vite'
-import vue from '@vitejs/plugin-vue'
+import { defineConfig } from 'vite';
+import vue from '@vitejs/plugin-vue';
+import { VitePWA } from 'vite-plugin-pwa';
 
 // https://vitejs.dev/config/
 export default defineConfig({
-  plugins: [vue()],
+  plugins: [
+    vue(),
+    VitePWA(),
+  ],
   resolve: {
     alias: {
       '@': fileURLToPath(new URL('./src', import.meta.url))