Update vite.config.js

vite.config.js

@@ -1,5 +1,4 @@
 import { defineConfig } from 'vite'
-import tailwindcss from '@tailwindcss/vite'
 import react from '@vitejs/plugin-react'
 
 // https://vite.dev/config/
@@ -18,8 +17,8 @@ export default defineConfig({
   },
   preview:{
     host: true,
-    allowedHosts: {
+    allowedHosts: [
       "pos-system-vl4d.onrender.com"
-    }
+    ]
   }
 })