While containerization revolutionized the delivery and execution of software, it introduces new challenges as the usual practice with one big software file-system with a subsequent module load to rule all environments is not feasible with containers. This lighting talk introduces the 'HPC Container Conformance' Project which aims to provide guidance on how to build container images and how to annotate them so that end-users and system admins can integrate them in their workflows. In 2023 an OCI Working Group was formed to aim for changes to the image spec to allow for such information to be stored within the OCI standard.