Apptainer documentation

Proposed outline:

• What is Apptainer / containerization
  • Why / when to use containers
• Loading Apptainer + using with a docker container
  • Include example - perhaps with a tensorflow container?
    • use this container for example: https://catalog.ngc.nvidia.com/orgs/nvidia/containers/tensorflow
    • shell and exec
    • using with GPUS: --nv
  • bind mounts - default + modifying for your workload
  • Setting APPTAINER_CACHEDIR to a location in your work directory
• Writing a sif file + building an apptainer sif on Unity
  • include unsetting APPTAINER_BINDPATH before the build
• Apptainer + MPI
• Dockerfile -> Apptainer workflow (@gstuart will probably write this)