initialize sanity but studio on localhost not wokring

studio/sanity.config.ts

@@ -0,0 +1,27 @@
+import {defineConfig} from 'sanity'
+import {structureTool} from 'sanity/structure'
+import {visionTool} from '@sanity/vision'
+import {schemaTypes} from './schemaTypes'
+import { codeInput } from '@sanity/code-input';
+
+const projectId = process.env.PUBLIC_SANITY_PROJECT_ID!;
+const dataset = process.env.PUBLIC_SANITY_DATASET!;
+
+export default defineConfig({
+  name: 'default',
+  title: 'briannelson.dev',
+  basePath: "/admin",
+
+  projectId,
+  dataset,
+
+  plugins: [
+    structureTool(), 
+    visionTool(),
+    codeInput(),
+  ],
+
+  schema: {
+    types: schemaTypes,
+  },
+})