feat(docker): add standalone Docker setup and remove docker-compose

- Replace Laravel Sail docker-compose with a single-container Dockerfile
- Configure nginx and PHP-FPM via supervisor for production-like environment
- Include optimized PHP extensions and Redis support
- Simplify deployment by removing multi-service orchestration

Dockerfile

@@ -0,0 +1,25 @@
+FROM php:8.4-fpm
+
+WORKDIR /var/www
+
+RUN apt-get update && apt-get install -y \
+    git curl zip unzip libpng-dev libonig-dev \
+    libxml2-dev nginx supervisor \
+    && docker-php-ext-install pdo pdo_mysql mbstring exif pcntl bcmath gd
+
+RUN pecl install redis && docker-php-ext-enable redis
+
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+COPY . .
+
+RUN composer install --no-dev --optimize-autoloader
+
+COPY docker/nginx.conf /etc/nginx/nginx.conf
+COPY docker/supervisord.conf /etc/supervisor/conf.d/supervisord.conf
+
+RUN chown -R www-data:www-data /var/www/storage /var/www/bootstrap/cache
+RUN chmod -R 775 /var/www/storage /var/www/bootstrap/cache
+
+EXPOSE 80
+CMD ["/usr/bin/supervisord"]