[vz-dev] [volkszaehler/vzlogger] 8fb5b1: Update Dockerfile (#517)

[Alex]

  Branch: refs/heads/master
  Home:   https://github.com/volkszaehler/vzlogger
  Commit: 8fb5b1fabf7f68353e187d977c657654c6e2a25a
      https://github.com/volkszaehler/vzlogger/commit/8fb5b1fabf7f68353e187d977c657654c6e2a25a
  Author: Alex <isarrider at gmail.com>
  Date:   2022-04-20 (Wed, 20 Apr 2022)

  Changed paths:
    M Dockerfile

  Log Message:
  -----------
  Update Dockerfile (#517)

remove volume
use buster slim