Update Monolog action level to info, adjust Dockerfile permissions and logging configuration, and set supervisord user to root

docker/php/Dockerfile

@@ -125,7 +125,9 @@ COPY docker/prod/entrypoint.sh /entrypoint.sh
 
 RUN chmod +x /entrypoint.sh \
  && mkdir -p /run/nginx /var/log/supervisor \
- && chown -R www-data:www-data /var/www/html
+ && chown -R www-data:www-data /run/nginx /var/log/supervisor /var/www/html
+RUN mkdir -p /var/lib/nginx /var/log/nginx && chown -R www-data:www-data /var/lib/nginx /var/log/nginx
+RUN sed -i 's|^error_log =.*|error_log = /proc/self/fd/2|' /usr/local/etc/php-fpm.conf
 
 EXPOSE 8080