How to set default project on startup node-red?

hello guys.
Can I know how to set the default project on startup node-red.
when I use multiple projects on node-red.
and it is managed by pm2.

when I startup node-red from pm2, it always connected the first project.
I want each project to be mapped to each node-red process.

Can I set the configuration file for this?

Thanks.

I don't know of a direct way. I think that the active project is defined in the file ~/.node-red/.config.projects.json.

So each of the instances you want to start up will need a different file. Assuming you only want to ever run a single instance of node-red at a time, your PM2 startup script will need to copy the correct version of the file to the live file name.