I needed to find the Nginx config files aligned somewhere somehow. And I was aware of limitations apt packaging system have, when I simple need to list the config files. Lucky for me lists of config files exist in
/var/lib/dpkg/info
and specifically for ngnix I found them with this command
cat nginx-common.conffiles
and this is not all since I was able to list the configs
/etc/default/nginx /etc/init.d/nginx /etc/init/nginx.conf /etc/logrotate.d/nginx /etc/nginx/fastcgi.conf /etc/nginx/fastcgi_params /etc/nginx/koi-utf /etc/nginx/koi-win /etc/nginx/mime.types /etc/nginx/nginx.conf /etc/nginx/proxy_params /etc/nginx/scgi_params /etc/nginx/sites-available/default /etc/nginx/snippets/fastcgi-php.conf /etc/nginx/snippets/snakeoil.conf /etc/nginx/uwsgi_params /etc/nginx/win-utf /etc/ufw/applications.d/nginx
Thanks.