We do not provide Docker at this time and Docker containers will not work. There are currently many projects that expect access to virtualized containers (and/or root access) to run; we are investigating ways to support them better. For now, Emby can only be run with the instructions we provide, which install .NET to your home directory and then run Emby's latest provided release with that version of .NET. I've updated our instructions to use 6.0.10 which is the latest version of the .NET Run