expose webServer.serverURL property

[rangav]

Hi

Can you please expose server url property so when server is already running, we can access the url without starting it again.

// example use case
let server = new StaticServer(8080, path, { keepAlive: true });

if (!server.running) {
            var url = await server.start();
            console.log("Server URL", url);
} else {
           // get server url 
       var url = server.serverUrl;  
}

One more question => Should we have only single instance of server with in the app? What is server initialization recommendation?