feat: Access Logging on the user server

Closes: #98

Co-authored-by: Roberto Abdelkader Martínez Pérez <robertomartinezp@gmail.com>

internal/server/model/handler.go

@@ -41,4 +41,10 @@ type Handler struct {
 
 	// Writer is the original http.ResponseWriter of the request.
 	Writer http.ResponseWriter
+
+	// Status is the returned status code
+	Status int
+
+	// SentBytes is the number of sent bytes
+	SentBytes int64
 }