ssh-enabled-docker-image
docker build -t my-jupyter-nglview-ssh .
docker tag my-jupyter-nglview-ssh:latest cerit.io/tslaninakova/my-jupyter-nglview-ssh:latest
docker push cerit.io/tslaninakova/my-jupyter-nglview-ssh:latest
in jupyterhub, use "Custom image": cerit.io/tslaninakova/my-jupyter-nglview-ssh:latest