Installing Node-RED and Adding Nodes on an emonPi

I've installed Node-RED and node-red-node-emoncms on an emonPi (firmware 2.0 and emoncms vlow-write v8.5). Everything seemed to install OK.  But now I want to "Deploy" a Node-Red flow and I am getting lots of "read-only file system" errors.  I am guessing this is because the .node-red directory is installed at '/home/pi/.node-red' and it is a read-only.  Where do others recommend installing the .node-red install directory?  Is there a standardized location?