Update Dockerfile to .NET 8

server/Startup.cs

@@ -39,6 +39,19 @@ namespace Server {
 			services.AddSingleton<IDatabase, Database>();
 			services.AddSingleton(NodaTime.DateTimeZoneProviders.Tzdb);
 
+			services.AddSingleton<IFileStorage>((serviceProvider) => {
+				var conf = serviceProvider.GetRequiredService<IConfiguration>();
+				var section = conf.GetSection("FileStorage");
+				switch (section["Type"]) {
+					case "local": {
+						var dir = section["Directory"];
+						return new LocalFileStorage(dir!);
+					}
+					default:
+						throw new Exception("Unable to configure FileStorage");
+				}
+			});
+			
 			services.AddControllers()
 				.AddNewtonsoftJson(options => {
 					options.SerializerSettings.ContractResolver = new DefaultContractResolver {