[GRASS-git] [OSGeo/grass] 8c7000: Dockerfile READMEs added

[Markus Neteler]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: 8c70005879f19525da59e557da5f0f88274a21d3
      https://github.com/OSGeo/grass/commit/8c70005879f19525da59e557da5f0f88274a21d3
  Author: Markus Neteler <neteler at mundialis.de>
  Date:   2019-10-02 (Wed, 02 Oct 2019)

  Changed paths:
    A docker/README_debian.md
    A docker/README_ubuntu.md

  Log Message:
  -----------
  Dockerfile READMEs added