Find Phillips Hue Bridge in Production Web App on Other Network

I am using the node-hue-api package on an Node.js/Express server to work with the Hue API. I've built an admin section of a website that only I can access that I'd like to use to control my Hue lights. This works fine in my dev environment as my localhost is obviously running on the same network/IP as the Bridge.

I think the problem is that when I push my changes to my production environment -- which is running on a Digital Ocean droplet of a different IP that the Bridge isn't connected to or aware of, it obviously can't find the Bridge -- returns empty array as response:

I can't be the first to have this problem, but the documentation for Hue in general is sparse. I'm already doing both UPnP and N-UPnP searches, but I've seen mentions of doing an IP scan where you can set a specific IP to look for (I know the IP), but documentation for that is practically non-existent. Any ideas?

Since docs are sparse and this is close to working, here's the useful parts of my code in case it helps others or shows I'm doing something wrong.

hue    = require("node-hue-api");



//===== Hue =====



var HueApi = require("node-hue-api").HueApi,

    lightState = hue.lightState,

    timeout = 5000;



var displayResult = function(result) {

    console.log(JSON.stringify(result, null, 2));

};



var displayError = function(err) {

    console.error(err);

};



var displayBridges = function(bridge) {

    console.log("Hue Bridges Found: " + JSON.stringify(bridge));

};



hue.nupnpSearch().then(displayBridges).done();

hue.upnpSearch(timeout).then(displayBridges).done();



var hostname = "my-ip-address",

    username = "my-registered-user-hash",

    api = new HueApi(hostname, username),

    state = lightState.create(),

    lightsObject;



//Get all lights attached to the bridge

api.lights(function(err, lights) {

    if (err) throw err;

    lightsObject = lights;

    displayResult(lightsObject);

    console.log(lightsObject);

});

I then pass the lightsObject to my admin page through the render function, do a for loop to loop through each light in the returned object, then show some toggle switches based on the state in the object. Then , I run a jQuery AJAX call to the app.put method here, which runs the node-hue-api code to set the light's state, passing the lightId from the value attribute of the toggle from the admin page. Here's a pic to show that working.



And the code. Could probably combine these, but I wanted separate calls in case I want to do something more creative with the on state.

app.put('/lighton', function(req, res) {

    //Set the state of the light

    api.setLightState(req.body.lightId, state.on())

        .fail(displayError)

        .done();

});



app.put('/lightoff', function(req, res) {

    //Set the state of the light

    api.setLightState(req.body.lightId, state.off())

        .fail(displayError)

        .done();

});