How to save node-red flows persistent?

[hsammer]

Hello.

I’m using hilschernetpi/netpi-nodered:latest. So far everything is fine.
But now I wonder how to save my flows in a persistent way.
The official node-red documentation tells that beginning with version 1.0 
setting, user and flow directory resides within /data directory which should be mapped to a persistent volume.
By the way the documentation mentions that this directory should be owned by the user node-red (1000:1000).

I have no glue how to do this on the netPi (running Firmware Version 1.2.0.0).
 
The log of above image gives me the following output.

Welcome to Node-RED
===================
5 Nov 12:57:42 - [info] Node-RED version: v0.20.8
5 Nov 12:57:42 - [info] Node.js  version: v8.16.1
5 Nov 12:57:42 - [info] Linux 4.9.80-rt62 arm LE
5 Nov 12:57:43 - [info] Loading palette nodes
5 Nov 12:57:55 - [s7comm-Info] - Debug configuration for logLevelNodeS7:{"debug":0,"silent":true}
5 Nov 12:57:55 - [s7comm-Info] - Debug configuration for logLevelNodeRED:{"debug":2,"silent":true}
5 Nov 12:57:59 - [info] Dashboard version 2.16.3 started at /ui
5 Nov 12:58:00 - [info] Settings file  : /root/.node-red/settings.js
5 Nov 12:58:00 - [info] Context store  : 'default' [module=memory]
5 Nov 12:58:00 - [info] User directory : /root/.node-red
5 Nov 12:58:00 - [warn] Projects disabled : editorTheme.projects.enabled=false
5 Nov 12:58:00 - [info] Flows file     : /root/.node-red/flows_xxxxxxx.json
5 Nov 12:58:00 - [info] Creating new flow file
5 Nov 12:58:00 - [warn] 

 
So how to map /root/.node-red directory to any persistent volume?

Editing settings.js doesn't help either because this file is destroyed too at a container restart.


Regards
 
P.S.: I have searched the forum many times but didn’t find any answer. So I wonder again if nobody else has this problem. Maybe I missed something.