hi @scroak_6473 , just to let you know, as part of ProGet 5.3.10 release, we shipped the ProGetCore container image.
You can follow the normal steps in the Linux and Docker Installation Guide to install/upgrade, but just use progetcore for the container instead of proget.
Aside from support for the Lucene-based Maven feed indexing (in progress), it seems to be feature complete. And of course, if there are problems, you can switch back to proget:5.3.10 or downgrade as needed (no database schema changes).
For example, docker pull proget.inedo.com/productimages/inedo/progetcore:5.3.10
Getting LDAP/LDAPS to work on Linux was a whole different problem to solve; the three major libraries (DotNetCore, Mono, Novell) all had separate and strange bugs. We'll be blogging about this, but for now, it might be a step in the right direction for addressing the problems you're seeing, at the very least.