* had a hard time with docker image only to find out in the end - after hours - that I commented out the matrix-commander command for testing purposes :see-no-evil:

* There is still testing if I use ENTRYPOINT in the _Dockerfile_ or only entrypoint in the _docker-compose.yml_ as the latter worked well and without any problem.
* fritzab2matrix.py is now executable (WATCHOUT! The hashbang points to your system's python3 NOT to your virtualenv where the dependencies are met!)
* the monitoring is now part of the main function

docker/docker-compose.yml

@@ -7,8 +7,9 @@ services:
       context: ../.
       dockerfile: ./docker/Dockerfile
     working_dir: /app
-    volumes:
-      - ./:/app
+    entrypoint: ./fritzab2matrix.py
+#    volumes:
+#      - ./:/app