Scaffold Symfony 8 app with Bootstrap/DataTables and Docker stack

- Symfony 8.1 webapp skeleton on PHP 8.5 (AssetMapper/importmap, no Node)
- Form-login gate: User entity, security.yaml, SecurityController,
  app:user:create command, initial migration (user + messenger_messages)
- Bootstrap 5 + DataTables layout (base/login/home templates); any
  table.datatable is auto-initialised
- trusted_proxies/headers wired for the shared Nginx Proxy Manager
- Docker (servers only): docker-compose.yml (php:8.5-fpm-alpine,
  nginx:1.30-alpine, mariadb:12.3; host ports 8085/3310; external
  docker_default network) + docker/{Dockerfile,php.ini,nginx,setup.sh,restart.sh}
- .env with CHANGEME placeholders (no secrets), .gitattributes enforces
  LF so the deploy scripts stay runnable on Linux

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

assets/app.js

@@ -0,0 +1,36 @@
+/*
+ * dmtools front-end entrypoint (Symfony AssetMapper / importmap).
+ * Loaded from base.html.twig via {{ importmap('app') }}.
+ */
+import './stimulus_bootstrap.js';
+
+import 'bootstrap/dist/css/bootstrap.min.css';
+import 'datatables.net-bs5/css/dataTables.bootstrap5.min.css';
+import './styles/app.css';
+
+import * as bootstrap from 'bootstrap';
+import DataTable from 'datatables.net-bs5';
+
+window.bootstrap = bootstrap;
+
+// Turn any <table class="datatable"> into a DataTable. Opt out per-table with
+// data-datatable="false"; pass options as a JSON object in data-datatable-options.
+function initDataTables(root = document) {
+    root.querySelectorAll('table.datatable').forEach((table) => {
+        if (table.dataset.datatable === 'false' || DataTable.isDataTable(table)) {
+            return;
+        }
+        let options = { pageLength: 25, order: [] };
+        if (table.dataset.datatableOptions) {
+            try {
+                options = { ...options, ...JSON.parse(table.dataset.datatableOptions) };
+            } catch (e) {
+                console.error('Invalid data-datatable-options on', table, e);
+            }
+        }
+        new DataTable(table, options);
+    });
+}
+
+document.addEventListener('DOMContentLoaded', () => initDataTables());
+document.addEventListener('turbo:load', () => initDataTables());