docs: update LAN launch and local IP test instructions

README.md

@@ -6,10 +6,15 @@ No-build browser game using plain **HTML/CSS/JS/PHP**.
 
 ```bash
 cd "/Users/lawsonawhittington/.openclaw/workspace/Dino Land"
-php -S localhost:8000
+php -S 0.0.0.0:8000
 ```
 
-Open: http://localhost:8000
+Open on the same machine: http://localhost:8000
+
+LAN test URL (from another device on your network):
+1. Find your LAN IP:
+   `python3 -c "import socket;s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM);s.connect(('8.8.8.8',80));print(s.getsockname()[0]);s.close()"`
+2. Open: `http://<YOUR_LAN_IP>:8000` (example: `http://192.168.1.25:8000`)
 
 ## Controls