https://www.techradar.com/news/best-linux-server-distro

As a free and open source operating system, Linux is the ideal candidate for setting up your own server. The community of developers behind each Linux distribution (distro) regularly review the source code of their chosen OS to make sure it's free of bugs.

When it comes to servers, the emphasis should obviously be on stability. While upgrades are a good thing on the face of it, they have the potential to interfere with the smooth running of your server.