invokable provision script controllers

app/Http/Controllers/ProvisionScript.php

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+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+
+class ProvisionScript extends Controller
+{
+    public function __invoke(Request $request)
+    {
+        $validated = $request->validate([
+            'sudo_password' => ['required', 'string'],
+            'hostname' => ['required', 'string'],
+            'server_id' => ['required', 'integer', 'exists:servers,id'],
+        ]);
+
+        $script = file_get_contents(base_path('provision.sh'));
+
+        $keystonePublicKey = file_get_contents(storage_path('app/private/ssh/id_ed25519.pub'));
+
+        $script = str_replace('[!hostname!]', $validated['hostname'], $script);
+        $script = str_replace('[!sudo_password!]', $validated['sudo_password'], $script);
+        $script = str_replace('[!server_id!]', $validated['server_id'], $script);
+        $script = str_replace('[!keystonepublickey!]', $keystonePublicKey, $script);
+        $script = str_replace('[!callback!]', route('provision.callback'), $script);
+
+        return response($script)
+            ->header('Content-Type', 'text/plain');
+    }
+}