I installed Pterodactyl on a dedicated server and installed a kernel I found online, as well as from the official Pterodactyl Eggs source. The problem is that it only supports 41.78.16 There's a Steam Beta Branch section. I specify "unstable", "42.13" etc., but it doesn't work. I leave the field blank and it installs version 41.78.16.
Docker link: ghcr.io/ptero-eggs/steamcmd:debian