How Do I debug NodeJS on Heroku?

Hi, 

I am running NodeJS on Heroku free account and my laptop is connected to a router. I followed these docs to connect the IntelliJ IDE to Heroku and I am able to deploy the project, but I am not able to debug it.

https://www.jetbrains.com/help/idea/run-debug-configuration-heroku-deployment.html#d1929637e38

https://stackoverflow.com/questions/38568917/how-could-i-debug-a-node-js-app-deploy-on-heroku

When deploying the app for debug,

I get the following in the Herokou logs

app[web.1]: [heroku-exec] Starting
app[web.1]: Debugger listening on ws://127.0.0.1:9229/3bdee650-712c-4517-83ac-b70c50c81bf0

and the following error message in IntelliJ IDEA

Error running 'invulnerable-formage-12345':
Unable to open debugger port (127.0.0.1:9229): java.io.IOException "handshake failed - unrecognized message from target VM"

Thanks for your help.

---- The details below were fixed according to my understanding of the answer below --------------

I am using port 9229, so I 

1. I set my router to forward all incoming traffic from ALL IPs port 9229 to my laptop's private IP port 9229

2. I set IntelliJ IDE configuration to work with my Heroku account. This part works and I am able to deploy my app.

3. In my configuration profile for debug I put :

    Debug Host:  141.236.15.153

The IP I get from https://www.whatismyip.com/ - my public IP:

    Debug port: 9229

4. I ran the following commands in DIFFERENT Windows 10 terminal windows. commands:

    heroku ps:exec   (I don't do a Ctrl+C to break out of the $ prompt)

   heroku ps:forward 9229 (keep open while debugging)

5. My procfile has this singe line:

web: node --inspect-brk index.js

 6. my launch.json file is:

{
  "type": "node",
  "request": "attach",
  "name": "Heroku",
  "address": "141.236.15.153",
  "port": 9229,
  "protocol": "inspector",
  "localRoot": "${workspaceFolder}",
  "remoteRoot": "/app"
}