perf: finish web performance pass

web/astro.config.mjs

@@ -1,9 +1,14 @@
 // @ts-check
 import { defineConfig } from 'astro/config';
+import node from '@astrojs/node';
 import react from '@astrojs/react';
 import tailwindcss from '@tailwindcss/vite';
 
 export default defineConfig({
+  output: 'server',
+  adapter: node({
+    mode: 'standalone',
+  }),
   integrations: [react()],
   i18n: {
     locales: ['zh', 'zh_Hant', 'en'],