Docker entrypoint: doing fail when {open,my}data.log doesn't exist

docker/root_files/entrypoint.sh

@@ -44,8 +44,8 @@ fi
 mkdir -p /var/log/{apps,uwsgi,nginx,postgresql}/
 chgrp django /var/log/apps
 chmod g+ws /var/log/apps
-chown opendata:django /var/log/apps/opendata.log
-chown mydata:django /var/log/apps/mydata.log
+[ -e /var/log/apps/opendata.log ] && chown opendata:django /var/log/apps/opendata.log
+[ -e /var/log/apps/mydata.log ] && chown mydata:django /var/log/apps/mydata.log
 
 echo "Starting ElasticSearch"
 chown -R elastic:elastic /opt/elasticsearch/{data,logs}