fix: added nx config in example

Author: MathurAditya724

examples/mcp-sdk/package.json

@@ -20,5 +20,12 @@
     "tsx": "^4.19.3",
     "typescript": "^5.8.2",
     "@types/express": "^5.0.1"
+  },
+  "nx": {
+    "targets": {
+      "build": {
+        "dependsOn": ["^build"]
+      }
+    }
   }
-}
+}