move / check into separat feature ("root")

Signed-off-by: Peter Siegmund <developer@mars3142.org>

server/cinema/lib/feature/root/root.service.dart

@@ -0,0 +1,25 @@
+import 'package:cinema/feature/websocket/websocket.service.dart';
+import 'package:cinema/injectable.dart';
+import 'package:injectable/injectable.dart';
+import 'package:shelf/shelf.dart';
+import 'package:shelf_router/shelf_router.dart';
+
+part 'root.service.g.dart';
+
+@injectable
+class RootService {
+  @Route.get('/')
+  Future<Response> getRoot(Request request) async {
+    final isWebSocket =
+        request.headers['connection']?.toLowerCase() == 'upgrade' &&
+        request.headers['upgrade']?.toLowerCase() == 'websocket';
+
+    if (isWebSocket) {
+      return getIt<WebSocketService>().handler(request);
+    }
+
+    return Response.ok('REST response');
+  }
+
+  Router get router => _$RootServiceRouter(this);
+}