fix docker build

reverse-proxy/nginx.conf.template

@@ -2,7 +2,8 @@ server {
   listen 80 default_server;
   server_name ${SERVER_NAME};
   server_tokens off;
-
+  etag off;
+  
   #client_max_body_size ${NGINX_CLIENT_MAX_BODY_SIZE};
 
   proxy_http_version 1.1;