We are pleased and excited to announce the first full release of Apptainer, version 1.0.0. As a reminder Singularity has joined the Linux Foundation and is now Apptainer. This is the first full release after the rename and has a lot of new features, bug fixes, etc..
Please read the release notes and see the admin documentation on migrating from Singularity and the user documentation on Singularity compatibility.
Please test it in your environment and report problems as an issue on github.