Here is the final final solution
Here is the detail
1. wget --header="TOKEN:secured_token" "http://mbo.helioho.st/cgi-bin/my_script_for_build.py" : this cgi script contains the commands that run "npm install" + "npm run build"
2. touch tmp/restart.txt : after "npm run build" I need to restart the Node JS application, according to Plesk documentation it can be done by creating a file named "restart.txt" in folder "tmp"
3. wget "http://mbo.helioho.st/api/version" : when creating the file "tmp/restart.txt" the server will restart after the next request, that's why I immediately send a request to my application in order it to restart immediately after my new build