Fix: add config file used for testing to docker image

Dockerfile

@@ -30,6 +30,7 @@ RUN mkdir -p /etc/wireplumber/scripts
 COPY src /srv/src
 COPY tests /srv/tests
 COPY config/sample.engine-core.docker.ini /srv/config/engine-core.ini
+COPY config/sample-production.engine-core.ini /srv/config/sample-production.engine-core.ini
 COPY Makefile /srv/Makefile
 COPY VERSION /srv/VERSION
 COPY scripts/wireplumber /etc/wireplumber/scripts