Don't add empty port mappings to the tracker

- The empty maps are added for every container that is created that
  doens't have a port mapping, this can spam the logs and make the
  debugging harder.

Signed-off-by: Nino Kodabande <nkodabande@suse.com>

pkg/tracker/porttracker.go

@@ -46,6 +46,10 @@ func NewPortTracker(forwarder *forwarder.VtunnelForwarder, wslAddrs []types.Conn
 
 // Add adds a container ID and port mapping to the tracker.
 func (p *PortTracker) Add(containerID string, portMap nat.PortMap) error {
+	if len(portMap) == 0 {
+		return nil
+	}
+
 	p.mutex.Lock()
 	p.portmap[containerID] = portMap
 	log.Debugf("PortTracker Add status: %+v", p.portmap)