[GRASS-git] [OSGeo/grass] d32844: use copy instead of git clone in Dockerfiles (#151)

[mmacata]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: d32844692514b8c543b557a368576bef1421340b
      https://github.com/OSGeo/grass/commit/d32844692514b8c543b557a368576bef1421340b
  Author: mmacata <mmacata at users.noreply.github.com>
  Date:   2019-10-15 (Tue, 15 Oct 2019)

  Changed paths:
    A .dockerignore
    M docker/alpine/Dockerfile_alpine
    M docker/alpine/Dockerfile_alpine_wxgui
    M docker/alpine/README_alpine.md
    M docker/debian/Dockerfile_debian_pdal
    M docker/debian/README_debian.md
    M docker/ubuntu/Dockerfile_ubuntu_pdal
    M docker/ubuntu/README_ubuntu.md

  Log Message:
  -----------
  use copy instead of git clone in Dockerfiles (#151)