FotoJson is a photo organizer.
You can use it for your own site, by changing ./site/.sshdir to output an SSH heading for your site, copying ./site/images/index-sample.json to index.json, and editing it to reflect the images you want to initially appear.
The bin/update-site to copy the files to your site.
To compile the Elm code into JavaScript in site/elm.js:
bin/build
Do development by starting elm reactor in the fotojson
directory, then aiming your browser at
http://localhost:8000/site/index.html. Each time you build, you can
full-reload the browser tab.
To upload the code to FotoJson.com (if you're me), bin/update-site.