proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Access-Control-Allow-Origin $http_origin;
proxy_set_header Access-Control-Allow-Methods "GET,POST,PUT,DELETE,OPTIONS";
proxy_set_header Access-Control-Allow-Credentials "true";
proxy_set_header Access-Control-Allow-Headers "Авторизация,DNT,User-Agent,Keep-Alive,Content-Type,accept,origin,X-Requested-With";
Где нужно устанавливать подобные параметры?