View Laravel command logs in docker container - php

Question

I'm running a Laravel PHP application as a container on AWS ECS. The container runs both php-fpm and nginx in the same container.
I didn't write the application, I'm a DevOps guy, but I'm struggling with a Command that I added recently to generate a sitemap.xml.
The important bits of the application's Dockerfile is an ENTRYPOINT script which contains this...
nginx -g "daemon off;" &
echo "--- Clearing artisan cache"
yes | php artisan config:clear
echo "--- Running migrations"
yes | php artisan migrate
echo "--- Seeding database"
yes | php artisan db:seed
echo "--- Running final container command"
exec "$#"
And its CMD looks like this:
CMD ["php-fpm", "--nodaemonize", "--force-stderr"]
The PHP command I C&P'd from the Spatie sitemap generator examples looks like this:
<?php
namespace App\Console\Commands;
use Illuminate\Console\Command;
use Spatie\Sitemap\SitemapGenerator;
class GenerateSitemap extends Command
{
/**
* The console command name.
*
* #var string
*/
protected $signature = 'sitemap:generate';
/**
* The console command description.
*
* #var string
*/
protected $description = 'Generate the sitemap.';
/**
* Execute the console command.
*
* #return mixed
*/
public function handle()
{
// modify this to your own needs
SitemapGenerator::create(config('app.url'))
->writeToFile(public_path('sitemap.xml'));
}
}
If I exec into the running container and run php artisan schedule:list I see the following output:
0 0 * * * php artisan sitemap:generate ........ Next Due: 12 hours from now
The container has been running for nearly a week with this command, but if I run find / -name "sitemap.xml" I see no results and if I view mywebsite.co.uk/sitemap.xml I get no response.
The main problem I'm having is that I have no idea how to diagnose any problems with this command. I've got Sentry configured correctly (it reports exceptions - but nothing related to this command) and my container logs only appear to show Nginx access logs.
If I navigate through the container's file structure, I can't see any PHP logs at all. I'm wondering if the PHP logs are working as expected, but the command is just failing silently?
Any thoughts on the command itself or the container PHP logs would be greatly appreciated.