console.aws.amazon.com
security group --> allow certain port

find out which port is opened
A telnet 127.0.0.1 6403
B sockstat | grep 6403
C install lynx

sudo pkg install -y lynx
lynx http://127.0.0.1:6403
Q to quit (q is ok too)

node.js
127.0.0.1 --> 0.0.0.0 to allow ALL 

^AQAZ2wsx@US-> cd

^AQAZ2wsx@US-> npm ls
foo@ /home/foo
|
 --- express@4.21.1

^AQAZ2wsx@US-> npm install express