Use "npm start" as command to forever in .sh script - node.js

Question

I have a .sh script in my /etc/init-d/forever to configure how forever starts and stops my Node.js app.
I wanted to start forever with the command npm start, so I can trigger my scripts from there. Is this possible?
I tried
sudo forever start --sourceDir /home/my-app -c npm start
but its gets wrong interpreted...
info: Forever processing file: start
error: Cannot start forever
error: script /root/start does not exist.
My script so far is:
NAME=nodeapp
SOUREC_DIR=/home/nodeapp
COMMAND="npm start"
SOURCE_NAME=index.js
USER=root
NODE_ENVIROMENT=production
pidfile=/var/run/$NAME.pid
logfile=/var/log/$NAME.log
forever=forever
start() {
export NODE_ENV=$NODE_ENVIROMENT
echo "Starting $NAME node instance : "
touch $logfile
chown $USER $logfile
touch $pidfile
chown $USER $pidfile
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080
sudo -H -u $USER $forever start --pidFile $pidfile -l $logfile -a --sourceDir $SOUREC_DIR -c $COMMAND
RETVAL=$?
}

Answer 1

So I found the answer.
Both --sourceDir and the path parameter after the "npm start"command where necessary:
sudo forever --sourceDir /home/my-app -c "npm start" /

Answer 2

The below command run the forever command in the background with logs in forever.
forever start -c "ng serve " ./
Note the ./
Then you can
forever list
And will be able to see the status and the location of the log file.
info: Forever processes running
data: uid command script forever pid id logfile uptime
data: [0] wOj1 ng serve 29500 24978 /home/user/.forever/wOj1.log 0:0:25:23.326