New NGINX version fix security vulnerability

Nginx 1.13.2 has the security vulnerability CVE-2017-7529.

Author: yuriolive

Dockerfile

@@ -6,7 +6,7 @@ ENV php_conf /usr/local/etc/php-fpm.conf
 ENV fpm_conf /usr/local/etc/php-fpm.d/www.conf
 ENV php_vars /usr/local/etc/php/conf.d/docker-vars.ini
 
-ENV NGINX_VERSION 1.13.2
+ENV NGINX_VERSION 1.13.3
 
 RUN GPG_KEYS=B0F4253373F8F6F510D42178520A9993A1C052F8 \
   && CONFIG="\