Update vite.config.ts

Author: cc-hearts

playground/vite.config.ts

@@ -3,6 +3,7 @@ import vue from '@vitejs/plugin-vue'
 import UnoCSS from 'unocss/vite'
 
 export default defineConfig({
+  base: './',
   plugins: [vue(), UnoCSS()],
   resolve: {
     alias: {