fix cancellation bug

main.go

···
 			if err := srv.Close(); err != nil {
 				log.Error("server shutdown", err)
 			}
+			cancel()
 		})
 		g.Add(func() error {
 			_, err := tsWaitStatusReady(ctx, log, lc)
···
 			if err := srv.Close(); err != nil {
 				log.Error("TLS server shutdown", err)
 			}
+			cancel()
 		})
 	}