Change replicas to 0 for docker environment

docker/compose/mozdef_cron/files/backup.conf

@@ -10,7 +10,7 @@ backup_pruning = 180,0
 weekly_rotation_indices = events
 refresh_interval = 1s
 number_of_shards = 1
-number_of_replicas = 1
+number_of_replicas = 0
 slowlog_threshold_query_warn = 5s
 slowlog_threshold_fetch_warn = 5s
 mapping_total_fields_limit = 1000