I'm using a customised IRIS Community Edition Docker Container: Node.js has been added and the Native API for Node.js directory moved to a node_modules folder in /home/irisowner. I've changed the _SYSTEM password using the Management Portal (which connects to IRIS just fine)
If I shell into the running container and try to connect with a JS script file containing this:
const IRISNative = require('intersystems-iris-native');
let connectionInfo = {
host: 'localhost',
port: 1972,
ns: 'USER',