update seo

vite.config.ts

@@ -1,7 +1,7 @@
 import { defineConfig, loadEnv } from 'vite'
 import react from '@vitejs/plugin-react'
 import fs from 'fs'
-import path from 'path'
+import path, { resolve } from 'path'
 
 function injectFirebaseConfig(content: string, env: Record<string, string>): string {
   return content
@@ -60,6 +60,12 @@ export default defineConfig({
   build: {
     chunkSizeWarningLimit: 1000,
     rollupOptions: {
+      input: {
+        main: resolve(__dirname, 'index.html'),
+        about: resolve(__dirname, 'about.html'),
+        privacy: resolve(__dirname, 'privacy.html'),
+        termsofservice: resolve(__dirname, 'termsofservice.html'),
+      },
       output: {
         manualChunks(id) {
           if (id.includes('node_modules/firebase')) {