feat(node): pair onboard computers with the Core fleet through UI

apps/node-agent/cmd/node-agent/main.go

@@ -69,6 +69,11 @@ func run() error {
 		return err
 	}
 	app := &node.Server{Store: store, Assets: assets, Origin: "http://" + *listen, Version: version, Inventory: func() node.Inventory { return node.Host("/") }}
+	pairing, err := node.OpenPairing(store, *dir, version, app.Inventory)
+	if err != nil {
+		return err
+	}
+	app.Pairing = pairing
 	app.Access = &node.AccessStore{Path: filepath.Join(*dir, "ssh-keys.json"), Users: func() []string { return node.LocalAdmins("/") }}
 	if err := os.MkdirAll(filepath.Dir(*socket), 0700); err != nil {
 		return err
@@ -104,6 +109,7 @@ func run() error {
 	go func() { errs <- private.Serve(unix) }()
 	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
 	defer stop()
+	go pairing.Run(ctx)
 	log.Print("Mission Core Node " + version + " listening on loopback")
 	select {
 	case err = <-errs: