Hi, I also follow this tipic. Not all the synology NAS support Docker (my ds218j does not) and without a native package I can’t upgrade to new version.
Is it on plan for the future to build the package?
For devices that support Docker you may also consider a native Virtual Machine as base for your environment.
Can’t say much about native installation, but maybe synology packages would need to use the installed java version which would lead to the same problem when ther is no Java 11 available.