Increase nginx timeout to 300s (#384)

nginx_rock/etc/nginx.conf

@@ -77,7 +77,7 @@ http {
       proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
       proxy_pass http://localhost:8081;
 
-      location ~ ^/event/[0-9]+/manage/registration/[0-9]+/registrations/(import|email)$ {
+      location ~ ^/event/[0-9]+/manage/(.*)$ {
         # add_header and proxy_set_header are inherited from the / location
         proxy_hide_header Cache-Control;
         proxy_read_timeout 300;