Bump nginx's version for the docker

Author: dedok

Diff for: Dockerfile

@@ -17,7 +17,7 @@ RUN addgroup -S nginx \
 
 ENV NGINX_VERSION=1.11.1 \
     NGINX_UPSTREAM_MODULE_URL=https://github.com/tarantool/nginx_upstream_module.git \
-    NGINX_UPSTREAM_MODULE_COMMIT=8290d60 \
+    NGINX_UPSTREAM_MODULE_COMMIT=2d2076c97b7bfa689624518d33dd09497aaecc34 \
     NGINX_GPG_KEYS=B0F4253373F8F6F510D42178520A9993A1C052F8
 
 ENV NGINX_LUA_MODULE_URL=https://github.com/openresty/lua-nginx-module \

Diff for: nginx.conf

@@ -1,5 +1,5 @@
 user  nginx;
-worker_processes  1;
+worker_processes  2;
 
 error_log  /var/log/nginx/error.log warn;
 pid        /var/run/nginx.pid;