creates a nginx docker image with a jekyll based image library. Image source is a zip file available via http(s)
docker build \
--build-arg "ZIP_URL=https://link/to/zip/file" \
--build-arg "TITLE=Title of Image-Gallery" \
--build-arg "THUMBNAIL_SIZE=x300" \
--build-arg "DISPLAY_SIZE=2048x2048" \
-t myImageGallery