This is a proof of concept to show that stopping and starting a PM2 process does not lead it to picking up upgraded interpreters.
I use nvm and these instructions assume you do too.
To run this:
npm install
pm2 start
pm2 logs
Note that the process is logging the version of the interpreter once a second.
nvm use <some other version
pm2 stop <id>
pm2 start <id>
Note that the process is still logging the old version
pm2 delete <id>
pm2 start
Note that the process is now logging the new version of Node.