Personally, I use Rocky Linux on my servers. It’s stable, and has plenty of support since it’s RHEL-based. It’s supported until 2030 or so, and it doesn’t have any of the cloud-init or netplan stuff that Ubuntu Server has.
It’s also pretty simple to set up docker/podman containers, although you need the EPEL for podman-compose and for a lot of other packages, but once you get your setup the way you like it, it just keeps running and running.
While I don’t like the main Jira software, the Jira Service Management part is actually kind of decent for my needs. It basically allows me to create a help desk for my small business, where they can report issues and I can view them in the Jira app. It’s somewhat limited on the free tier, only allowing 3 agents, but it works plenty fine for my use case.
As for the actual Jira software, I wouldn’t use it, since my workflow needs don’t require it.