feat: add basic webui

apps/docs/api-reference/introduction.mdx

@@ -0,0 +1,33 @@
+---
+title: 'Introduction'
+description: 'Example section for showcasing API endpoints'
+---
+
+<Note>
+  If you're not looking to build API reference documentation, you can delete
+  this section by removing the api-reference folder.
+</Note>
+
+## Welcome
+
+There are two ways to build API documentation: [OpenAPI](https://mintlify.com/docs/api-playground/openapi/setup) and [MDX components](https://mintlify.com/docs/api-playground/mdx/configuration). For the starter kit, we are using the following OpenAPI specification.
+
+<Card
+  title="Plant Store Endpoints"
+  icon="leaf"
+  href="https://github.com/mintlify/starter/blob/main/api-reference/openapi.json"
+>
+  View the OpenAPI specification file
+</Card>
+
+## Authentication
+
+All API endpoints are authenticated using Bearer tokens and picked up from the specification file.
+
+```json
+"security": [
+  {
+    "bearerAuth": []
+  }
+]
+```