Because I am getting the following error message on my server when I try to run my webhook_server.js application:

   code: 'EADDRINUSE',
0|webhook_ |   errno: -98,
0|webhook_ |   syscall: 'listen',
0|webhook_ |   address: '::',
0|webhook_ |   port: 3003

I run the following command
sudo lsof -i:3003

…indeed it logs out:

COMMAND  PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
node    2369 ubuntu   18u  IPv6  15268      0t0  TCP *:3003 (LISTEN)

How do I kill or close port 3003?