BootStrap: yum
OSVersion: 9
MirrorURL: https://ftp.uni-hannover.de/rocky/%{OSVERSION}/BaseOS/$basearch/os
Include: yum 

%setup
  echo "This section runs on the host outside the container during bootstrap"

%post
  echo "This section runs inside the container during bootstrap"

  # install packages in the container
  yum -y groupinstall "Development Tools"
  yum -y install wget vim python3 epel-release
  yum -y install python3-pip

  # install tensorflow
  pip3 install --upgrade tensorflow

  # enable access to BIGWORK and PROJECT storage on the cluster system
  mkdir -p /bigwork /project

%runscript
  echo "This is what happens when you run the container"

  echo "Arguments received: $*"
  exec /usr/bin/python3 "$@"

%test
  echo "This test will be run at the very end of the bootstrapping process"

  /usr/bin/python3 --version