The goal: to create a simple database of articles and comments.

The article contains: title (varchar), text (text), date of publication (datetime), contributor name (varchar). The comment contains: contributor name (varchar),email (varchar), text (text), date of publication (datetime), id of the comment to which he/she is responding (int, optional). The task is to implement a simple service that will allow to display a list of articles, article details, add a new article, and similarly work with comments.