A compatible JRE is bundled with the installation package, so you don't need to install it separately.
YouTrack is free forever for teams of up to 10 users, with all features included except a custom logo. System Requirements for YouTrack Server youtrack server download
YouTrack Server offers a perpetual license for the version acquired during an active subscription, meaning you can keep using it even if you don't renew updates. A compatible JRE is bundled with the installation
JetBrains provides several distribution formats to suit different server environments. You can find all official downloads on the JetBrains YouTrack Download page . 1. Docker Image (Recommended) Supported Environments | YouTrack Server - JetBrains youtrack server download