We are running Jira in a container from dockerhub. I do not have Jira Service Desk, how do I get this add-on? The only thing I see on Atlassians site is the full install for a server. Also, this server has no connection to the internet, so I can't just download it from the GUI. I need to obtain the add-on / plugin somehow, so I can add it either to the backend in the plugins folder or through the UI with the jar file.
I also do not see the ability to "try for free" on the applications page.