Add ARG BASE_REGISTRY=metasfresh to Dockerfiles

[metas-marcus]

Is this a bug or feature request?

Feature

What is the current behavior?

metasfresh docker registry hard coded

Which are the steps to reproduce?

What is the expected or desired behavior?

Variable ARG BASE_REGISTRY=metasfresh added to Dockerfiles so that it can be replaced with github registry via docker-compose.yml variable