https://github.com/photonixapp/photonix 4 years old?

https://github.com/thumbsup/thumbsup Simple enough

https://github.com/bpatrik/pigallery2 Made for RPi

https://github.com/photoprism/photoprism High memory demand

Test: https://gallery.danielgullberg.se

Quickstart: To use docker compose, create a folder with a compose.yaml-file. Then run

  docker compose up