🏗️(caldav) migrate from davical to sabre/dav

docker/sabredav/Dockerfile

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+# sabre/dav CalDAV Server
+# Based on Debian with Apache and PHP
+FROM php:8.2-apache-bookworm
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+    libpq-dev \
+    postgresql-client \
+    git \
+    unzip \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install PHP extensions
+RUN docker-php-ext-install pdo pdo_pgsql
+
+# Install Composer
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+# Create application directory
+WORKDIR /var/www/sabredav
+
+# Copy composer files
+COPY composer.json ./
+
+# Install sabre/dav and dependencies
+RUN composer install --no-dev --optimize-autoloader --no-interaction
+
+# Copy server configuration
+COPY server.php ./
+COPY sabredav.conf /etc/apache2/sites-available/sabredav.conf
+COPY init-database.sh /usr/local/bin/init-database.sh
+
+# Copy SQL schema files for database initialization
+COPY sql/ ./sql/
+
+# Copy custom principal backend
+COPY src/ ./src/
+
+# Enable Apache modules and site
+RUN a2enmod rewrite headers \
+    && a2dissite 000-default \
+    && a2ensite sabredav \
+    && chmod +x /usr/local/bin/init-database.sh
+
+# Set permissions
+RUN chown -R www-data:www-data /var/www/sabredav \
+    && chmod -R 755 /var/www/sabredav
+
+EXPOSE 80
+
+CMD ["apache2-foreground"]