Exercises for video 2-7

* [x] sorting database logs in HTML page (switch between alphabetical by mood or by timestamp)
* [ ] pagination on logs
* [x] save the image as a file and path to file in database
* [x] draw on the image with p5 canvas?
* [x] use face-api.js somehow?

Start with the HTML page that displays the database logs and trace how the log records are loaded. Determine where pagination belongs, then verify that the logs can be viewed across multiple pages without losing the existing sorting behavior.

索引モデルが issue の本文から書いたものです。