update README.md

Author: gosunuts

README.md

@@ -2,19 +2,28 @@
 
 **x402-facilitator** is a Go-based middleware that settles on-chain payments authorized via the [x402 protocol](https://x402.dev).
 
-It Supports facilitator and client roles on EVM-compatible chains.
-
-
 ## Prerequisites
 - Docker
 - Docker Compose
 
+## Support Schemes
+| Scheme     | Status           | Description                   |
+|------------|------------------|-------------------------------|
+| EVM       | ✅ Supported      | Ethereum and EVM chains       |
+| Solana    | 🚧 Planned        |                               |
+| Sui       | 🚧 Planned        |                               |
+| Tron      | 🚧 Planned        |                               |
+
 # How to run
 ```bash
 docker compose up
 ```
 
-# Api Specification
+## Api Specification
+After starting the service, open your browser to:
 ```
 /swagger/index.html
 ```
+
+## Contributing
+We welcome any contributions! Feel free to open issues or submit pull requests at any time.