[vz-dev] [volkszaehler/volkszaehler.org] 2f7529: Add docker image (#725)

[andig]

  Branch: refs/heads/master
  Home:   https://github.com/volkszaehler/volkszaehler.org
  Commit: 2f752972365830ff1961f6a074e9493b30e46045
      https://github.com/volkszaehler/volkszaehler.org/commit/2f752972365830ff1961f6a074e9493b30e46045
  Author: andig <cpuidle at gmx.de>
  Date:   2019-03-06 (Wed, 06 Mar 2019)

  Changed paths:
    A .dockerignore
    M .travis.yml
    A Dockerfile
    M README.md

  Log Message:
  -----------
  Add docker image (#725)