The MinIO developers has made the unpopular decision to no longer provide Docker builds when a new version of MinIO is released. As mentioned in this thread minio/minio#21647, This project is a source only distribution now, if you want to build containers you need to build them yourselves. They also mention that The overall project is only receiving bug fixes and CVE patches for now; it is not actively being developed for new features.
We should either build from the source ourselves or find an alternate provider that does it for us. This is not urgent.