The video by @pierre-gilles on installing Node-Red is very well made.
apart from adding the command
sudo chown -R 1000:1000 /var/lib/node-red
that you gave in your post Rflink, Node Red et Gladys - #77 par Psoy for those who are on mini PCs.
and adding
-v /home/pi/.ssh/id_rsa:/home/node-red/.ssh/id_rsa:ro \\
For those who, like me, want to use their SSH key to control another device via SSH from Gladys with node-red-contrib-ssh-v3.
In my opinion there’s no need to reinvent the wheel, unless you want to go further later in explaining how to use Node-Red.