Tune the exported VOLUMES list.

Fixes nginx#5.

Author: thresheek

Dockerfile

@@ -13,8 +13,7 @@ RUN apt-get update && apt-get install -y nginx=${NGINX_VERSION}
 RUN ln -sf /dev/stdout /var/log/nginx/access.log
 RUN ln -sf /dev/stderr /var/log/nginx/error.log
 
-VOLUME ["/usr/share/nginx/html"]
-VOLUME ["/etc/nginx"]
+VOLUME ["/var/cache/nginx"]
 
 EXPOSE 80 443