load trending images from tmdb at startup

- need TMDB_API_KEY as environment variable
- mount /cache for data persistence

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

server/cinema/lib/feature/poster/domain/movie.dart

@@ -0,0 +1,18 @@
+import 'package:built_value/built_value.dart';
+import 'package:built_value/serializer.dart';
+
+part 'movie.g.dart';
+
+abstract class Movie implements Built<Movie, MovieBuilder> {
+  static Serializer<Movie> get serializer => _$movieSerializer;
+
+  int get id;
+
+  String get poster;
+
+  String get backdrop;
+
+  Movie._();
+
+  factory Movie([void Function(MovieBuilder) updates]) = _$Movie;
+}