Refactor to remove slices and environments, replace with instances.

app/Actions/Applications/CreateInstance.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Actions\Applications;
+
+use App\Models\Application;
+use App\Models\Instance;
+use App\Models\Server;
+
+class CreateInstance
+{
+    public function execute(
+        Application $application,
+        Server $server,
+        string $branch = 'main',
+        array $config = []
+    ): Instance {
+        return $application->instances()->create([
+            'server_id' => $server->id,
+            'branch' => $branch,
+            'status' => 'pending',
+            'config' => $config,
+        ]);
+    }
+}