Apply port selection logic to manifest publishing

src/Aspire.Hosting/Publishing/ManifestPublishingContext.cs

@@ -278,14 +278,17 @@ public void WriteBindings(IResource resource)
                 Writer.WriteString("protocol", endpoint.Protocol.ToString().ToLowerInvariant());
                 Writer.WriteString("transport", endpoint.Transport);
 
-                int? targetPort = (resource, endpoint.UriScheme, endpoint.TargetPort) switch
+                int? targetPort = (resource, endpoint.UriScheme, endpoint.TargetPort, endpoint.Port) switch
                 {
                     // The port was specified so use it
-                    (_, _, int port) => port,
+                    (_, _, int target, _) => target,
 
-                    // Project resources get their default port from the deployment tool
+                    // Container resources get their default listening port from the exposed port.
+                    (ContainerResource, _, _, int port) => port,
+
+                    // Project resources get their default listening port from the deployment tool
                     // ideally we would default to a known port but we don't know it at this point
-                    (ProjectResource, var scheme, null) when scheme is "http" or "https" => null,
+                    (ProjectResource, var scheme, null, _) when scheme is "http" or "https" => null,
 
                     // Allocate a dynamic port
                     _ => PortAllocator.AllocatePort()