upgrade-script.sh node running check enhancement

[FrankBlackMG]

upgrade-script.sh line 118 has:

if pgrep "node" > /dev/null; then

I happen to have nomachine installed on my pi4 and it has a process named nxnode. The pgrep command was finding it and aborting. I changed the script to:

if pidof "node" > /dev/null; then

and it worked fine. I supposed you could do this for the npm check as well. It's not bullet-proof but it worked for my case.

[sdetweil]

thanks.. didn't know about pidof

fixed