Add example config for persistent docker # 2

Author: timvaillancourt

scripts/docker-persistent.example.conf

@@ -1,7 +1,8 @@
-# DO NOT CHANGE 'log_dir' or 'backup.location'
+# DO NOT CHANGE 'log_dir' or 'backup.location' flags
+# when using with scripts/docker-persistent.sh!!!
 production:
   host: mongodb.example.com
-  port: 27019
+  port: 27017
   log_dir: /mongodb_consistent_backup/logs
   backup:
     method: mongodump