Overview
While trying the Docker version of TEI Publisher, I found that a Docker version of Cantaloupe was being used, so I created a repository for using it standalone.
https://github.com/nakamura196/docker_cantaloupe
Usage instructions are provided in the README of the above repository.
The following Docker image is used.
https://hub.docker.com/r/islandora/cantaloupe
Reference: Images That Can Be Served by Cantaloupe
This is explained on the following page.
https://cantaloupe-project.github.io/manual/5.0/images.html
For high-resolution images, JPEG2000 or Pyramidal Tiled TIFF is recommended.
On the other hand, for images with relatively low resolution, it appeared that JPEG and PNG files can be served directly.
http://localhost:8182/iiif/2/baby_role_towel_utsubuse.png/200,200,200,200/full/0/default.jpg

(Images from “Irasutoya” are used.)
Simply by placing images in the iiif folder, you can verify the behavior of the IIIF Image API.
Summary
I hope this serves as a helpful reference for verifying the behavior of Cantaloupe and the IIIF Image API.