Alpine-based container for fgallery.
docker build -t shulima/fgallery .
export PHOTO_DIR=/path/to/your/photos
export OUTPUT_DIR=/path/to/desired/output
docker run -it shulima/fgallery --help
docker run -it -v $PHOTO_DIR:/photos -v $OUTPUT_DIR:/output shulima/fgallery [...desired flags...] /photos /output/gallery
Note: fgallery will create a directory under $OUTPUT_DIR
instead of writing to it directly,
because it doesn't like existing output directories.