MAINT: removed outdated comment; print free space

.gitlab-ci.yml

@@ -20,7 +20,6 @@
 
 variables:
    CI_REGISTRY_IMAGE: $CI_REGISTRY/caosdb-advanced-testenv
-   # With dind the docker deamon is available on the network
    # When using dind, it's wise to use the overlayfs driver for
    # improved performance.
    DOCKER_DRIVER: overlay2
@@ -70,6 +69,7 @@ build-testenv:
   only:
       - schedules
   script: 
+      - df -h
       - docker login -u testuser -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
         # use here general latest or specific branch latest...
       - docker build