Fix UniFi OS authentication and simplify server architecture

- Use /api/auth/login for UniFi OS controllers (UDM, Cloud Gateway)
- Use /api/login for standalone controllers
- Refactor to use FastMCP's native mcp.run() with custom_route for /health
- Switch to network_mode: host for local network access
- Include README.md in Dockerfile for hatchling build

unifi_client.py

@@ -158,8 +158,17 @@ class UnifiClient:
         logger.warning("Controller type detection failed, defaulting to UniFi OS")
 
     async def _authenticate(self) -> None:
-        """Authenticate with the UniFi controller."""
-        login_url = f"{self.base_url}{self.api_prefix}/api/login"
+        """Authenticate with the UniFi controller.
+
+        UniFi OS (UDM, Cloud Gateway) uses /api/auth/login
+        Standalone controllers use /api/login
+        """
+        if self._is_unifi_os:
+            # UniFi OS uses a different auth endpoint (no api_prefix needed)
+            login_url = f"{self.base_url}/api/auth/login"
+        else:
+            # Standalone controller
+            login_url = f"{self.base_url}/api/login"
 
         payload = {
             "username": self.username,