add Dockerfile to bypass Nixpacks OOM

.dockerignore

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+.git
+.gitignore
+Dockerfile
+.dockerignore
+.env.example
+README.md

Dockerfile

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+FROM php:8.3-apache
+
+# Install mysqli extension required for database connections
+RUN docker-php-ext-install mysqli \
+    && docker-php-ext-enable mysqli
+
+# Enable Apache mod_rewrite for routing if needed
+RUN a2enmod rewrite
+
+# Copy project files to the web server root
+COPY . /var/www/html/
+
+# Set correct ownership for Apache
+RUN chown -R www-data:www-data /var/www/html
+
+# Expose port 80
+EXPOSE 80