Migrate from Kirby CMS to Hugo with Gokarna theme

- Remove all Kirby/PHP files
- Add Hugo config with Gokarna theme as git submodule
- Add nginx + Hugo Dockerfile replacing PHP/Apache
- Update deploy.php to run hugo after git pull
- Update .gitignore for Hugo output

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

kirby/Dockerfile

@@ -0,0 +1,29 @@
+FROM debian:bookworm-slim
+
+# Install nginx, PHP-CLI, git, curl
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    nginx \
+    php-cli \
+    php-fpm \
+    git \
+    curl \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Hugo (extended)
+ARG HUGO_VERSION=0.147.0
+RUN curl -L "https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-amd64.tar.gz" \
+    | tar -xz -C /usr/local/bin hugo
+
+# nginx config
+COPY nginx.conf /etc/nginx/sites-available/default
+
+# PHP-FPM for deploy.php
+RUN sed -i 's|listen = /run/php/php.*-fpm.sock|listen = 127.0.0.1:9000|' /etc/php/*/fpm/pool.d/www.conf
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+EXPOSE 80
+
+ENTRYPOINT ["/entrypoint.sh"]