Testing is complete!! And a nice build runner script to boot

backend/test/routes/health_test.dart

@@ -4,19 +4,20 @@ import 'package:dart_frog/dart_frog.dart';
 import 'package:mocktail/mocktail.dart';
 import 'package:test/test.dart';
 
-import '../../routes/index.dart' as route;
+import '../../routes/health.dart' as route;
 
 class _MockRequestContext extends Mock implements RequestContext {}
 
 void main() {
-  group('GET /', () {
-    test('responds with a 200 and "Welcome to Dart Frog!".', () {
+  group('GET /health', () {
+    test('responds with a 200 and an empty body.', () async {
       final context = _MockRequestContext();
       final response = route.onRequest(context);
+      final body = await response.body();
       expect(response.statusCode, equals(HttpStatus.ok));
       expect(
-        response.body(),
-        completion(equals('Welcome to Dart Frog!')),
+        body,
+        '',
       );
     });
   });