Logging a systemctl node process to a specific log file

I need to make a systemctl log to specific log file. It is currently running a node script that watches a server.

ExecStart=/usr/local/bin/node /root/nodeinbound/RAI/RAI_SERVER_WATCHER.js 

Is the process that it runs from.

I start the program with systemctl start RAI.service

How can i make this log to a custom log file (preferably not journal)?

via Krunkmaster