increase nginx default timeout

-Prevents 504 timeout errors when loading large job metrics

nginx/templates/default.conf.template

@@ -17,5 +17,6 @@ server {
         include fastcgi_params;
         fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
         fastcgi_param HTTPS off;
+        fastcgi_read_timeout 300;
     }
 }