Can't set up websocket on my ec2 instance

I followed this post and I created this below:

const express = require('express'); const https = require('https'); const WebSocket = require('ws'); const fs = require('fs'); var privateKey = fs.readFileSync('key.pem', 'utf8'); var certificate = fs.readFileSync('cert.pem', 'utf8'); var credentials = {key: privateKey, cert: certificate}; var app = express(); var httpsServer = https.createServer(credentials, app); httpsServer.listen(3000); var WebSocketServer = require('ws').Server; var wss = new WebSocketServer({ server: httpsServer }); wss.on('connection', function connection(ws) { ws.on('message', function incoming(message) { console.log('received: %s', message); }); ws.send('something'); }); 

Running this seems fine on the surface, but then when I try to connect to said websocket on the same ec2 instance with ws = new WebSocket('wss://(the private or public Ip, or the domain for my website, I tried all of them):3000'; and I get the error: WebSocket connection to 'wss://stuff' failed:

Are there additional logs I could look at that might reveal the problem, maybe an additional step I need because of how I'm trying to set this up on an ec2, or is there just something plain wrong with what I did here? Thanks!