fix: added some business rules to article creation

internal/infrastructure/useCases/CreateArticle.go

@@ -18,8 +18,13 @@ func NewCreateArticleUseCase(articleRepository article.Repository) *CreateArticl
 }
 
 func (g *CreateArticleUseCase) CreateArticle(createArticle CreateArticleCommand) (article.Article, error) {
+	if len(createArticle.Title) < 3 || len(createArticle.Title) > 200 {
+		return article.Article{}, article.ErrInvalidTitle
+	}
+
 	return g.articleRepository.Create(article.Article{
-		Title: createArticle.Title,
-		Body:  createArticle.Body,
+		Title:    createArticle.Title,
+		Body:     createArticle.Body,
+		IsOnline: false,
 	})
 }