location / {
	add_header Access-Control-Allow-Origin *;
	add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS";
	add_header Access-Control-Allow-Headers "DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authori-zation,Authorization";
	...
}