TLJH on M1 Mac (Arm) Docker: installer is x86-specific

[psychemedia]

There was some work on getting TLJH running on an RPi which should also work for M1?

It seems that the PR that arose from the discussion is still unaccepted:

• thread: Supporting ARM architectures · Issue #62 · jupyterhub/the-littlest-jupyterhub · GitHub
• PR: Supporting ARM64 (and still AMD64) architectures. Traefik binaries adjusted. Swapped miniforge in for miniconda. by cdibble · Pull Request #679 · jupyterhub/the-littlest-jupyterhub · GitHub