feat: update live demos

docs/index.md

@@ -2,17 +2,27 @@
 
 A groundbreaking programmable staking framework ensuring every effort is rewarded fairly.
 
+## Hackathon Live Demo
+
+- [YouBet Admin](https://youbet-admin.vercel.app/goals)
+  - Admin dashboard with different levels of authority for tourists, Linea wallet holders, and goal creators
+- [YouBet GM](http://121.40.102.77:5000/)
+  - An application powered by the [YouBet SDK](https://www.npmjs.com/package/youbet-sdk) designed to help you wake up early and check in
+- [Live SDK Sample Usage](https://37hedj53hqh8y.ahost.marscode.site/)
+  - Live demonstration of [sample code](https://github.com/YoubetDao/youbet-sdk/tree/main/examples/simple-react) available in our SDK source code. You can run it by yourself.
+
 ## Introduction
 
 - [You Bet: Goal-Driven Staking Is All You Need](./introduction/introduction)
 - [Use Cases](./introduction/use-cases)
 - [Vision](./introduction/vision)
 
 ## Contract
+
 - [How GDS works](./contract/how-gds-works)
 - [ABI](./contract/abi)
 
-
 ## SDK
+
 - [Quickstart](./sdk/quickstart)
 - [Api](./sdk/api)