diff --git a/docker/backend/Dockerfile b/docker/backend/Dockerfile
index bb79c8cd4..fd0af0932 100644
--- a/docker/backend/Dockerfile
+++ b/docker/backend/Dockerfile
@@ -6,6 +6,9 @@ FROM ${FROM_IMG}:${FROM_TAG}
 # TODO: debug information
 RUN find /
 RUN echo "PWD:" && pwd
+RUN ls -a /__w/1/s
+RUN ls -a ${PROJECT_DIR}
+RUN ls -a ${MOUNT_DIR}
 
 ENV LANG=de_DE.UTF-8