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/bin/server.dart

@@ -1,7 +1,8 @@
 import 'dart:io';
 
-import 'package:cinema/feature/poster/poster.service.dart';
-import 'package:cinema/feature/root/root.service.dart';
+import 'package:cinema/feature/poster/data/repositories/image_loader.dart';
+import 'package:cinema/feature/poster/data/services/poster.service.dart';
+import 'package:cinema/feature/root/data/service/root.service.dart';
 import 'package:cinema/feature/version/version.dart';
 import 'package:cinema/injectable.dart';
 import 'package:shelf/shelf.dart';
@@ -32,6 +33,14 @@ void main(List<String> args) async {
       print(banner);
     }
 
+    print('Caching current trending images...');
+
+    final ImageLoader loader = getIt();
+    final movies = await loader.getPosterURIs();
+    for (var movie in movies) {
+      await loader.downloadImages(movie);
+    }
+
     getIt<Version>().printVersion();
 
     print('Serving at ${server.address.host}:${server.port}\n');