How does one Configure a Fixie Proxy on a Heroku Laravel App? - php

Question

I'm trying to setup the Fixie Static IP Heroku Add-On for my Laravel Application.
Here's the only code that they supply in the documentation for PHP projects.
<?php
function proxyRequest() {
$fixieUrl = getenv("FIXIE_URL");
$parsedFixieUrl = parse_url($fixieUrl);
$proxy = $parsedFixieUrl['host'].":".$parsedFixieUrl['port'];
$proxyAuth = $parsedFixieUrl['user'].":".$parsedFixieUrl['pass'];
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_PROXY, $proxy);
curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyAuth);
curl_close($ch);
}
$response = proxyRequest();
print_r($response);
?>
My issue is that I don't know where this code should be placed within my Laravel App.
Should I be using Laravel Trusted Proxies? Or just configuring this manually?
I'm also using Custom Domains on Heroku, so when someone accesses the custom domain, I need the request to route through the Fixie Proxy and utilize the Static IP's.
Any help would be greatly appreciated.
I've tried searching around my codebase for where this code should be placed, but I'm not having any luck finding the solution.
There is another Add-On called QuotaGuard that does the same thing, and the documentation is almost identical.
I went with Fixie because there's a free plan, and I'm just trying to get the Proxy set up.
Thank you for any help in advance.