Add ability to report if bonob is registered

src/server.ts

@@ -1,20 +1,23 @@
 import express, { Express } from "express";
 import * as Eta from "eta";
-import { Sonos, servicesFrom } from "./sonos";
+import { Sonos, servicesFrom, registrationStatus } from "./sonos";
 
 function server(sonos: Sonos): Express {
   const app = express();
-  app.use(express.static("./web/public"));
 
+  app.use(express.static("./web/public"));
   app.engine("eta", Eta.renderFile);
+
   app.set("view engine", "eta");
   app.set("views", "./web/views");
 
   app.get("/", (_, res) => {
     sonos.devices().then(devices => {
+      const services = servicesFrom(devices)
       res.render("index", {
         devices,
-        services: servicesFrom(devices),
+        services,
+        registration: registrationStatus(services)
       })
     })
   });