Better generation of installation ID.

app/Support/System/GeneratesInstallationId.php

@@ -0,0 +1,28 @@
+<?php
+declare(strict_types=1);
+
+namespace FireflyIII\Support\System;
+
+use Log;
+use Ramsey\Uuid\Uuid;
+
+/**
+ * Trait GeneratesInstallationId
+ */
+trait GeneratesInstallationId
+{
+    /**
+     *
+     */
+    protected function generateInstallationId(): void
+    {
+        $config = app('fireflyconfig')->get('installation_id', null);
+        if (null === $config) {
+            $uuid5    = Uuid::uuid5(Uuid::NAMESPACE_URL, 'firefly-iii.org');
+            $uniqueId = (string) $uuid5;
+            Log::info(sprintf('Created Firefly III installation ID %s', $uniqueId));
+            app('fireflyconfig')->set('installation_id', $uniqueId);
+        }
+    }
+
+}