Hello prashant chakurkar
Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.
Microsoft releases updated Windows Server Base OS container images monthly on the second Tuesday each month. Microsoft does not provide in-container patching, we should update base images by pulling newer Microsoft container images with the latest cumulative updates.
How to automate rebuilding container images based on updated base images:https://learn.microsoft.com/en-us/virtualization/windowscontainers/deploy-containers/update-containers
Configure Windows Server Core Windows Update : https://learn.microsoft.com/en-us/windows-server/administration/server-core/server-core-servicing?tabs=cmd%2Cupdate-powershell
SQL Server 2019 latest cumulative updates: https://support.microsoft.com/en-us/topic/kb5010657-description-of-the-security-update-for-sql-server-2019-gdr-february-8-2022-49c03140-0495-4504-82cd-e920c2ea81bc
Kindly let us know if the suggested steps helps or you need further assistance on this issue.