Add update lookup and telemetry, Add version and build to app config

app/Console/Commands/SelfHost/SelfHostCheckForUpdateCommand.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Console\Commands\SelfHost;
+
+use App\Service\ApiService;
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\Cache;
+
+class SelfHostCheckForUpdateCommand extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'self-host:check-for-update';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = '';
+
+    /**
+     * Execute the console command.
+     */
+    public function handle(): int
+    {
+        $apiService = app(ApiService::class);
+
+        $latestVersion = $apiService->checkForUpdate();
+        if ($latestVersion === null) {
+            $this->error('Failed to check for update, check the logs for more information.');
+
+            return self::FAILURE;
+        }
+
+        // Note: Cache for 13 hours, because the command runs twice daily (every 12 hours).
+        Cache::put('latest_version', $latestVersion, 60 * 60 * 12);
+
+        return self::SUCCESS;
+    }
+}