https://docs.hpc.gwdg.de/software_stacks/apptainer/index.htmlDescription Apptainer (formerly Singularity) is a free, cross-platform and open-source computer program that performs operating-system-level virtualization also known as containerization. One of the main uses of Apptainer is to bring containers and reproducibility to scientific computing and the high-performance computing (HPC) world. The need for reproducibility requires the ability to use containers to move applications from system to system. Using Apptainer containers, developers can work in reproducible environments of their choosing and design, and these complete environments can easily be copied and executed on other platforms.Hugoen