Update install.sh

[mribeirodantas]

The apptainer install.sh script is apparently failing silently. This fix should make Apptainer work again inside the container image.

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[nathanweeks]

I verified that this PR results in a successful apptainer installation.

However, I ran into the following error when attempting to use apptainer in a codespace (using the "codespaces-dev" dev container, i.e. .devcontainer/codespaces-dev/devcontainer.json) :

/tmp -> apptainer pull docker://docker.io/library/ubuntu:24.04
...
/tmp -> apptainer exec ubuntu_24.04.sif cat /etc/os-release
INFO   : A system administrator may need to enable user namespaces, install
INFO   :   apptainer-suid, or compile with ./mconfig --with-suid
ERROR  : Failed to create user namespace: user namespace requires to set /proc/sys/kernel/unprivileged_userns_clone to 1
/tmp -> cat /proc/sys/kernel/unprivileged_userns_clone
1       

Ultimately the following dev container runArgs were required to resolve all errors with the above apptainer exec command:

    "runArgs": [
        "--device=/dev/fuse",
        "--security-opt=seccomp=unconfined",
        "--security-opt=apparmor=unconfined"
    ],

For the "local-dev" dev container (.devcontainer/local-dev/devcontainer.json), the following sufficed in my environment---RockyLinux 8.10 with rootless Podman:

    "runArgs": [
        "--device=/dev/fuse"
    ],

though the other two --security-opt... options did no harm. (Note the "docker-outside-of-docker" feature does not appear to be immediately compatible with rootless podman, and was commented out).