Merge branch 'f-local-debian-repo' into 'dev'

Using local debian repo: Speed up the image building.

See merge request !69

CHANGELOG.md

@@ -14,7 +14,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed ###
 
 * Set PyYAML dependency back to PyYaml>=5.4.1 (from 6.0) for better
-  compatibility with docker-compose)
+  compatibility with docker-compose
+* Use Debian mirrors at Netcup for pipeline tests.
 
 ### Deprecated ###
 

unittests/docker/Dockerfile

 FROM debian:latest
+# Use local package repository
+COPY sources.list.local /etc/apt/
+RUN mv /etc/apt/sources.list /etc/apt/sources.list.orig
+RUN cat /etc/apt/sources.list.local /etc/apt/sources.list.orig > /etc/apt/sources.list
 RUN apt-get update && \
     apt-get install -y \
       pylint3 python3-pip tox git \

unittests/docker/sources.list.local

+# Local repositories at Netcup
+deb http://debian.netcup.net/debian/ buster main
+deb http://mirrors.n-ix.net/debian-security buster/updates main
+deb http://debian.netcup.net/debian/ buster-updates main
+
+# The original content follows here:
\ No newline at end of file