The official Docker image, which is built in CI, can be used as follows:
cd /path/to/notebook
mkdir output.docker
docker run \
-e LANG=C.UTF-8 -e LC_ALL=C.UTF-8 \
--tmpfs /tmp \
-v $PWD:/data \
sridca/emanote emanote -L "/data" gen /data/output.docker
open ./output.docker/index.html