build command

svelte.config.js

@@ -12,6 +12,10 @@ const config = {
 		// If your environment is not supported or you settled on a specific environment, switch out the adapter.
 		// See https://kit.svelte.dev/docs/adapters for more information about adapters.
 		adapter: adapter(),
+	},
+	preview:{
+		port: 3000,
+		strictPort:false,
 	}
 };