Uses express for the server, mongoose for MongoDB interaction, axios for HTTP requests, and cheerio for HTML parsing.

axios fetches HTML from the EchoJS website. cheerio parses the HTML and selects all <h2> elements within <article> tags.

A GET route at /articles fetches all articles from the database and returns them as JSON.

A GET route at /articles/:id fetches a specific article by its ID and populates its associated notes.

A POST route at /articles/:id creates a new note and associates it with an article by updating the article’s note field.