Alexa TTS - Trying to use Node.js on Synology NAS for auto cookie refresh

I am trying to launch the AlexaCookie.js app on a Synology NAS following these instructions but am running into problems and am hoping someone could point me in the right direction.

DSM 6.2 + Node.js 12 (node -v shows v12.16.3)

Node.js v12 package installed in Package Manager

ssh into Synology commands:

sudo npm install -g pm2 -- no errors

sudo pm2 start AlexaCookie.js -- no errors

sudo pm2 start AlexaCookie.js -- no errors

sudo pm2 startup -- Error: "Init system not found"

The AlexaCookie.js app has the following config.json:

{ "port":"81", "proxyPort":"82", "username": "", "password": "", "consoleLogging": false}

I went to the Synology Control Panel > Security > Firewall. It's turned on. I enabled Port 81-82 (Source Ports), All Protocols, Source IP = All, Allow

However, if I go to [NAS IP]:81 there's no page served...

My Linux knowledge is limited and my Node.js is very basic. Anyone able to point me to the mistake I'm making that's keeping the page from being served by Node.js?

Thanks in advance.

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