update doocs

Author: dks333

advanced/subpath/vercel.mdx

@@ -10,7 +10,7 @@ import SubpathGatingSnippet from "/snippets/custom-subpath-gating.mdx";
 ## Mint.json Configuration
 
 To host your documentation at a custom subpath using Vercel, you need to add the
-following configuration to your `mint.json` file.
+following configuration to your `vercel.json` file.
 
 ```json
 {
@@ -26,3 +26,15 @@ following configuration to your `mint.json` file.
   ]
 }
 ```
+
+<Note>
+  For more information, you can also refer to Vercel's offical guide on check
+  out the [Project Configuration:
+  Rewrites](https://vercel.com/docs/projects/project-configuration#rewrites)
+</Note>
+
+## Reach out to Mintlify team
+
+Once completing the Vercel setup, the Mintlify team will setup the
+subdirectory settings in your deployment. Reach out over
+[email](mailto:[email protected]).