Add roadmap management, service worker, and user invitation features

- Implemented roadmap.php for managing roadmap items with filtering options by quarter and status.
- Added a service worker (sw.js) to handle push notifications and click events for calendar appointments.
- Created users.php for admin to manage team members and invitations, including user creation and deletion functionalities.

Dockerfile

@@ -0,0 +1,10 @@
+FROM php:8.2-apache
+
+# Installeer MariaDB/MySQL drivers
+RUN docker-php-ext-install pdo pdo_mysql mysqli
+
+# Activeer Apache mod_rewrite voor schone URL's
+RUN a2enmod rewrite
+
+# Zorg dat Apache op poort 80 luistert
+EXPOSE 80