proxy_set_header Cookie $http_cookie;
proxy_pass_header Set-Cookie;
add_header Access-Control-Allow-Origin *;
#add_header Access-Control-Allow-Origin http://abc.com;
add_header Access-Control-Allow-Credentials true;
#add_header Access-Control-Allow-Headers X-Requested-With;
add_header Access-Control-Allow-Headers *;
add_header Access-Control-Allow-Methods GET,POST,PUT,DELETE,OPTIONS;