add example of dynamic routing (#100)

* add example of dynamic routing 

from issue #28 and comment by quuu, add example usage of dynamic routing

* README.md

* Clarify

---------

Co-authored-by: Andrew Qu <qual1337@gmail.com>

Author: ykaranke-allata

README.md

@@ -50,6 +50,56 @@ const handler = createMcpHandler(
 export { handler as GET, handler as POST };
 ```
 
+## Advanced Routing
+```typescript
+// app/dynamic/[p]/[transport]/route.ts
+
+import { createMcpHandler } from "@vercel/mcp-adapter";
+import type { NextRequest } from "next/server";
+import { z } from "zod";
+
+const handler = async (
+  req: NextRequest,
+  { params }: { params: Promise<{ p: string; transport: string }> }
+) => {
+  const { p, transport } = await params;
+
+  return createMcpHandler(
+    (server) => {
+      server.tool(
+        "roll_dice",
+        "Rolls an N-sided die",
+        { sides: z.number().int().min(2) },
+        async ({ sides }) => {
+          const value = 1 + Math.floor(Math.random() * sides);
+          return {
+            content: [{ type: "text", text: `🎲 You rolled a ${value}!` }],
+          };
+        }
+      );
+    },
+    {
+      capabilities: {
+        tools: {
+          roll_dice: {
+            description: "Roll a dice",
+          },
+        },
+      },
+    },
+    {
+      redisUrl: process.env.REDIS_URL,
+      basePath: `/dynamic/${p}`,
+      verboseLogs: true,
+      maxDuration: 60,
+    }
+  )(req);
+};
+export { handler as GET, handler as POST, handler as DELETE };
+
+
+```
+
 ## Connecting to your MCP server via stdio
 
 Depending on the version of your client application, remote MCP's may need to use