fix: installer checks containers only; the panel reads signed manifests from the registry when it has none; unsigned-updater nodes are labeled from the panel's manifests; sign node release images; release 0.3.0 [CI]

backend/src/MoShiro.Backend.Application/ApplicationServiceCollectionExtensions.cs

@@ -39,6 +39,7 @@ public static class ApplicationServiceCollectionExtensions
         services.AddSingleton<AuditService>();
         services.AddSingleton<ServerIdentityService>();
         services.AddSingleton<SetupService>();
+        services.AddSingleton<ReleaseFeed>();
         services.AddSingleton<BinaryBindingService>();
         services.AddSingleton<NodeOwnerService>();
         services.AddSingleton<Fleet.Server.IBinaryAttestor>(sp => sp.GetRequiredService<BinaryBindingService>());