MAINT: save docker logs as artifacts in gitlab ci

.gitlab-ci.yml

@@ -83,11 +83,14 @@ test:
       - CERTPATH=$DIR"/cert" CAOSDB_TAG=$CAOSDB_TAG docker-compose  up -d
       - docker-compose -f tester.yml run tester 
       - rc=$?
-      - docker-compose  down
+      - docker-compose down
+      - docker logs docker_caosdb-server_1 > ../caosdb_log.txt
+      - docker logs docker_sqldb_1 > ../mariadb_log.txt
       - exit $rc
   artifacts:
     paths:
-    - /var/lib/docker/containers/*/*.log
+    - caosdb_log.txt
+    - mariadb_log.txt
 
 build-testenv:
   tags: [notls]