add missing command

Author: Manuela Weigold

Dockerfile

@@ -21,4 +21,4 @@ RUN  apt-get update \
 COPY clone-data-repo.sh clone-data-repo.sh
 
 # if ssh key is set, clone data repo with the sql scripts for initalization and start postgres afterwards
-CMD  700 clone-data-repo.sh && ./clone-data-repo.sh && su postgres -c "/usr/local/bin/docker-entrypoint.sh postgres"
+CMD  chmod 700 clone-data-repo.sh && ./clone-data-repo.sh && su postgres -c "/usr/local/bin/docker-entrypoint.sh postgres"