updated nginx image, see also #2

docker-compose.yml

 version: '2'
 services:
     web:
-        image: phundament/nginx-one:1.9-5.0.2
+        image: phundament/nginx-one:1.9-5.1.1
         environment:
           - FASTCGI_PASS_HOST=php
         depends_on:
@@ -13,4 +13,4 @@ services:
     php:
         image: ${STACK_PHP_IMAGE}
         volumes:
-            - /app/web
\ No newline at end of file
+            - /app/web