Fix www.conf ownership to allow runtime PHP-FPM overrides

The pool.d directory and www.conf were owned by root, preventing
the non-root udx user (uid 500) from applying PHP_FPM_MAX_CHILDREN
and other overrides via 35_phpfpm.sh at container startup.

Ref icamiami/icamiami.org#1923

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: andypotanin

Dockerfile

@@ -57,7 +57,8 @@ RUN sed -i "s|^error_log =.*|error_log = /dev/stderr|" /etc/php/"${PHP_VERSION}"
     sed -i "s|^listen.owner =.*|listen.owner = ${USER}|" /etc/php/"${PHP_VERSION}"/fpm/pool.d/www.conf && \
     sed -i "s|^listen.group =.*|listen.group = ${USER}|" /etc/php/"${PHP_VERSION}"/fpm/pool.d/www.conf && \
     sed -i "s|^listen.mode =.*|listen.mode = 0660|" /etc/php/"${PHP_VERSION}"/fpm/pool.d/www.conf && \
-    chown -R "${USER}:${USER}" /var/log/php/fpm.log
+    chown -R "${USER}:${USER}" /var/log/php/fpm.log && \
+    chown -R "${USER}:${USER}" /etc/php/"${PHP_VERSION}"/fpm/pool.d
 
 # Copy entrypoint script and set permissions
 COPY ./bin/start-nginx.sh /usr/local/bin/start-nginx.sh