move dev ports

packages/frontend/vite.config.js

@@ -1,12 +1,13 @@
 import { sveltekit } from '@sveltejs/kit/vite'
 import precompileIntl from 'svelte-intl-precompile/sveltekit-plugin'
 
+const port = 8001
+
 /** @type {import('vite').UserConfig} */
 const config = {
 	clearScreen: false,
-	server: {
-		port: 3000,
-	},
+	server: { port },
+	preview: { port },
 	plugins: [sveltekit(), precompileIntl('locales')],
 }