How to add elements to an array inside a document.

To add elements to an array inside a document, you will need to first retrieve the current array, then create a new array by concatenating the current array with the desired element(s), and finally use the `updateDocument` method to save the updated array to the database. There is currently no method in the documentation that allows for directly adding a single element to a document. Consequently, concatenation is the recommended approach for updating the array attribute.