update docker.auth.helper to note hardcoded prefix
update docker.auth.helper to note hardcoded prefix

hashicorp/nomad,burdandrei/nomad,nak3/nomad,Ashald/nomad,nak3/nomad,Ashald/nomad,hashicorp/nomad,burdandrei/nomad,nak3/nomad,nak3/nomad,nak3/nomad,burdandrei/nomad,Ashald/nomad,dvusboy/nomad,Ashald/nomad,dvusboy/nomad,hashicorp/nomad,dvusboy/nomad,dvusboy/nomad,burdandrei/nomad,dvusboy/nomad,dvusboy/nomad,nak3/nomad,hashicorp/nomad,burdandrei/nomad,nak3/nomad,dvusboy/nomad,Ashald/nomad,hashicorp/nomad,hashicorp/nomad,Ashald/nomad,Ashald/nomad,burdandrei/nomad,burdandrei/nomad