diff --git a/development-system/.gitignore b/development-system/.gitignore
index fc93c84..400a09a 100644
--- a/development-system/.gitignore
+++ b/development-system/.gitignore
@@ -1,6 +1,13 @@
 /vendor/
 /var/
-/public/assets/js/
+/public/assets
+/public/bundles
+/public/share
+/public/system
+/public/vendor
+/system
+/bin/console
 /node_modules/
 /.env
+/.env.local
 /.idea/
diff --git a/development-system/README.md b/development-system/README.md
index 76be6a8..9f9afb7 100644
--- a/development-system/README.md
+++ b/development-system/README.md
@@ -10,10 +10,16 @@ Voraussetzungen: Docker Desktop (Compose v2) und optional Node.js 20+ für die T
 docker compose up --build
 ```
 
-Danach:
+Beim ersten Start eines frischen Clones erzeugt Contao die benötigten Laufzeitverzeichnisse und Asset-Symlinks. Danach einmalig ausführen:
+
+```powershell
+docker compose exec app vendor/bin/contao-setup --no-interaction --env=dev
+docker compose exec app chown -R www-data:www-data var public
+docker compose exec app vendor/bin/contao-console contao:migrate --no-interaction
+```
 
 - Website/CMS: <http://localhost:8080>
-- Contao-Installation: <http://localhost:8080/contao/install>
+- Contao-Login: <http://localhost:8080/contao/login>
 - Datenbankinspektor: <http://localhost:8081> (Server `db`, Benutzer `perspektivwerk`, Passwort `perspektivwerk`, Datenbank `perspektivwerk`)
 
 Für die Frontend-Logik:
diff --git a/development-system/bin/console b/development-system/bin/console
new file mode 100644
index 0000000..73cced3
--- /dev/null
+++ b/development-system/bin/console
@@ -0,0 +1,33 @@
+#!/usr/bin/env php
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of Contao.
+ *
+ * (c) Leo Feyer
+ *
+ * @license LGPL-3.0-or-later
+ */
+
+use Contao\ManagerBundle\Console\ContaoApplication;
+use Contao\ManagerBundle\HttpKernel\ContaoKernel;
+use Symfony\Component\Console\Input\ArgvInput;
+
+set_time_limit(0);
+@ini_set('zlib.output_compression', '0');
+@ini_set('display_errors', '0');
+
+// System maintenance mode comes first as it has to work even if the vendor directory does not exist
+if ('contao:cron' === ($_SERVER['argv'][1] ?? null) && file_exists(__DIR__.'/../var/maintenance.html')) {
+    exit;
+}
+
+require __DIR__.'/../vendor/autoload.php';
+
+$input = new ArgvInput();
+$kernel = ContaoKernel::fromInput(\dirname(__DIR__), $input);
+
+$application = new ContaoApplication($kernel);
+$application->run($input);
diff --git a/development-system/composer.json b/development-system/composer.json
index 95db912..10d8db0 100644
--- a/development-system/composer.json
+++ b/development-system/composer.json
@@ -5,6 +5,8 @@
   "require": {
     "contao/managed-edition": "^5.3"
   },
+  "minimum-stability": "dev",
+  "prefer-stable": true,
   "scripts": {
     "post-install-cmd": [
       "Contao\\ManagerPlugin\\Bundle\\Config\\ScriptHandler::initializeApplication"
diff --git a/development-system/docker-compose.yml b/development-system/docker-compose.yml
index 04b002c..7f53da8 100644
--- a/development-system/docker-compose.yml
+++ b/development-system/docker-compose.yml
@@ -2,13 +2,13 @@ services:
   app:
     build:
       context: .
-      dockerfile: docker/php-apache/Dockerfile
+      dockerfile: php-apache/Dockerfile
     ports:
       - "8080:80"
     environment:
       APP_ENV: dev
       CONTAO_ENVIRONMENT: dev
-      DATABASE_URL: mysql://perspektivwerk:perspektivwerk@db:3306/perspektivwerk?serverVersion=mariadb-10.11
+      DATABASE_URL: mysql://perspektivwerk:perspektivwerk@db:3306/perspektivwerk?serverVersion=mariadb-10.11.0
     volumes:
       - ./:/var/www/html
       - contao_vendor:/var/www/html/vendor
diff --git a/development-system/php-apache/Dockerfile b/development-system/php-apache/Dockerfile
index 3e8453c..8ff1bb5 100644
--- a/development-system/php-apache/Dockerfile
+++ b/development-system/php-apache/Dockerfile
@@ -9,7 +9,7 @@ RUN apt-get update \
     && rm -rf /var/lib/apt/lists/*
 
 COPY --from=composer:2 /usr/bin/composer /usr/bin/composer
-COPY docker/php-apache/vhost.conf /etc/apache2/sites-available/000-default.conf
+COPY php-apache/vhost.conf /etc/apache2/sites-available/000-default.conf
 
 WORKDIR /var/www/html
 
diff --git a/development-system/public/.htaccess b/development-system/public/.htaccess
new file mode 100644
index 0000000..17b7b7f
--- /dev/null
+++ b/development-system/public/.htaccess
@@ -0,0 +1,60 @@
+<IfModule mod_rewrite.c>
+    RewriteEngine On
+
+    <IfModule mod_headers.c>
+        # Assets in /assets and /bundles either contain a hash in their filename
+        # or are called with a ?version suffix, therefore cache them for 1 year.
+        RewriteRule ^(assets|bundles)/ - [ENV=CONTAO_ASSETS:true]
+        Header set Cache-Control "max-age=31536000" env=CONTAO_ASSETS
+
+        # Allow CORS on the Contao TinyMCE skin.
+        RewriteRule ^assets/tinymce4/js/skins/contao/fonts/ - [ENV=CONTAO_TINYMCE_SKIN:true]
+        Header set Access-Control-Allow-Origin "*" env=CONTAO_TINYMCE_SKIN
+    </IfModule>
+
+    # Determine the RewriteBase automatically and set it as environment variable.
+    # If you are using Apache aliases to do mass virtual hosting or installed the
+    # project in a subdirectory, the base path will be prepended to allow proper
+    # resolution of the index.php file and to redirect to the correct URI. It will
+    # work in environments without path prefix as well, providing a safe, one-size
+    # fits all solution. But as you do not need it in this case, you can comment
+    # the following 2 lines to eliminate the overhead.
+    RewriteCond %{REQUEST_URI}::$1 ^(/.+)/(.*)::\2$
+    RewriteRule ^(.*) - [E=BASE:%1]
+
+    # Sets the HTTP_AUTHORIZATION header removed by Apache
+    RewriteCond %{HTTP:Authorization} .
+    RewriteRule ^ - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
+
+    # Redirect to URI without front controller to prevent duplicate content
+    # (with and without `/index.php`). Only do this redirect on the initial
+    # rewrite by Apache and not on subsequent cycles. Otherwise, we would get an
+    # endless redirect loop (request -> rewrite to front controller ->
+    # redirect -> request -> ...).
+    # So in case you get a "too many redirects" error or you always get redirected
+    # to the start page because your Apache does not expose the REDIRECT_STATUS
+    # environment variable, you have 2 choices:
+    # - disable this feature by commenting the following 2 lines or
+    # - use Apache >= 2.3.9 and replace all L flags by END flags and remove the
+    #   following RewriteCond (best solution)
+    RewriteCond %{ENV:REDIRECT_STATUS} ^$
+    RewriteRule ^index\.php(?:/(.*)|$) %{ENV:BASE}/$1 [R=301,L]
+
+    # If the requested filename exists, simply serve it.
+    # We only want to let Apache serve files and not directories.
+    RewriteCond %{REQUEST_FILENAME} -f
+    RewriteRule ^ - [L]
+
+    # Rewrite all other queries to the front controller.
+    RewriteRule ^ %{ENV:BASE}/index.php [L]
+</IfModule>
+
+<IfModule !mod_rewrite.c>
+    <IfModule mod_alias.c>
+        # When mod_rewrite is not available, we instruct a temporary redirect of
+        # the start page to the front controller explicitly so that the website
+        # and the generated links can still be used.
+        RedirectMatch 302 ^/$ /index.php/
+        # RedirectTemp cannot be used instead
+    </IfModule>
+</IfModule>
diff --git a/development-system/public/index.php b/development-system/public/index.php
new file mode 100644
index 0000000..91a5f19
--- /dev/null
+++ b/development-system/public/index.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of Contao.
+ *
+ * (c) Leo Feyer
+ *
+ * @license LGPL-3.0-or-later
+ */
+
+use Contao\ManagerBundle\HttpKernel\ContaoKernel;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\TerminableInterface;
+
+// Suppress error messages (see #1422)
+@ini_set('display_errors', '0');
+
+// Disable the phar stream wrapper for security reasons (see #105)
+if (in_array('phar', stream_get_wrappers(), true)) {
+    stream_wrapper_unregister('phar');
+}
+
+// System maintenance mode comes first as it has to work even if the vendor directory does not exist
+if (file_exists(__DIR__.'/../var/maintenance.html')) {
+    $contents = file_get_contents(__DIR__.'/../var/maintenance.html');
+
+    http_response_code(503);
+    header('Content-Type: text/html; charset=UTF-8');
+    header('Content-Length: '.strlen((string) $contents));
+    header('Cache-Control: no-store');
+
+    die($contents);
+}
+
+$loader = require __DIR__.'/../vendor/autoload.php';
+
+$request = Request::createFromGlobals();
+$kernel = ContaoKernel::fromRequest(dirname(__DIR__), $request);
+
+$response = $kernel->handle($request);
+$response->send();
+
+if ($kernel instanceof TerminableInterface) {
+    $kernel->terminate($request, $response);
+}
diff --git a/development-system/public/preview.php b/development-system/public/preview.php
new file mode 100644
index 0000000..64e9f10
--- /dev/null
+++ b/development-system/public/preview.php
@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of Contao.
+ *
+ * (c) Leo Feyer
+ *
+ * @license LGPL-3.0-or-later
+ */
+
+use Contao\ManagerBundle\HttpKernel\ContaoKernel;
+use FOS\HttpCache\TagHeaderFormatter\TagHeaderFormatter;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\TerminableInterface;
+
+// Suppress error messages (see #1422)
+@ini_set('display_errors', '0');
+
+// Disable the phar stream wrapper for security reasons (see #105)
+if (in_array('phar', stream_get_wrappers(), true)) {
+    stream_wrapper_unregister('phar');
+}
+
+// System maintenance mode comes first as it has to work even if the vendor directory does not exist
+if (file_exists(__DIR__.'/../var/maintenance.html')) {
+    $contents = file_get_contents(__DIR__.'/../var/maintenance.html');
+
+    http_response_code(503);
+    header('Content-Type: text/html; charset=UTF-8');
+    header('Content-Length: '.strlen((string) $contents));
+    header('Cache-Control: no-store');
+
+    die($contents);
+}
+
+$loader = require __DIR__.'/../vendor/autoload.php';
+
+$request = Request::createFromGlobals();
+$request->attributes->set('_preview', true);
+
+$kernel = ContaoKernel::fromRequest(dirname(__DIR__), $request);
+$response = $kernel->handle($request);
+
+// Prevent preview URLs from being indexed
+$response->headers->set('X-Robots-Tag', 'noindex');
+
+// Force no-cache on all responses in the preview front controller
+$response->headers->set('Cache-Control', 'no-store');
+
+// Strip all tag headers from the response
+$response->headers->remove(TagHeaderFormatter::DEFAULT_HEADER_NAME);
+$response->send();
+
+if ($kernel instanceof TerminableInterface) {
+    $kernel->terminate($request, $response);
+}