xcftools as small docker image (~5 MB) to allow the usage of the xcftools without installation.
docker run -t -v $(pwd):/tmp think/xcftools xcfinfo /tmp/YOUR_IMAGE.xcf
docker run -t -v $(pwd):/tmp think/xcftools xcf2png /tmp/YOUR_IMAGE.xcf > DESTINATION.png
- xcftools based on https://github.com/j-jorge/xcftools