Add nfs-common to act as NFS client

cloud-init.sh

 #!/bin/bash
 sudo apt update
 sudo apt -y upgrade 
-sudo apt -y install python3 python3-dev git curl
+sudo apt -y install python3 python3-dev git curl nfs-common
 curl -L https://tljh.jupyter.org/bootstrap.py | sudo -E python3 - --admin <admin-user-name> --user-requirements-txt-url https://git-ce.rwth-aachen.de/christoph.koenig/hfd-jupyterhub/-/raw/main/requirements.txt?ref_type=heads