message: Update DOCKER_README.md
diff: --------------------------------------------------------------------------------
  -How To Run Processor Counter Monitor Server Container from Docker Hub
  +How To Run Processor Counter Monitor Server Container from GitHub Container Repository or Docker Hub
  --------------------------------------------------------------------------------
  As root user:
  1. ``modprobe msr``
  -2. ``docker run -d --name pcm --privileged -p 9738:9738 ghcr.io/opcm/pcm`` (GitHub Container repository) or ``docker run -d --name pcm --privileged -p 9738:9738 opcm/pcm`` (Dockerhub repository)
  +2. ``docker run -d --name pcm --privileged -p 9738:9738 ghcr.io/opcm/pcm`` (GitHub Container Repository) or ``docker run -d --name pcm --privileged -p 9738:9738 opcm/pcm`` (Dockerhub repository)
  - the container can also be run with limited capabilities without the privileged mode: ``docker run -d --name pcm --cap-add=SYS_ADMIN --cap-add=SYS_RAWIO --device=/dev/cpu --device=/dev/mem -v /sys/firmware/acpi/tables/MCFG:/pcm/sys/firmware/acpi/tables/MCFG:ro -v /proc/bus/pci/:/pcm/proc/bus/pci/ -v /proc/sys/kernel/nmi_watchdog:/pcm/proc/sys/kernel/nmi_watchdog -p 9738:9738 ghcr.io/opcm/pcm`` (there is also a docker-compose file containing these options: https://raw.githubusercontent.com/opcm/pcm/master/docker-compose.yml)
  This will start pcm-sensor-server container exposing CPU metrics from the whole system at port 9738
  