Update Dockerfile to .NET 8

server/Startup.cs

@@ -39,19 +39,6 @@ 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 {