I was just getting ready to install a VM for some HLDSes and thought "Hmm, I wonder if there is a Docker container for this" and was pleasantly surprised to see a Sven Co-op server, used to run a bunch many years ago and want to get back into it again.
Since you have plenty of other HLDSes, any chance of adding a "The Specialists" mod? https://www.moddb.com/mods/the-specialists ts-3-final-linux.tar.gz is the file you would want.