locally modified host, such as
127.0.0.1 www.xxx.com
node starts a service on port 8080, proxies to port 80 through nginx, and accesses the wwww.xxx.com development project locally
then something happened. The operator provided a page wwww.xxx.com/hello, that needs to be embedded locally. At this time, nginx can allow other requests to access the local area normally and forward / hello to the online
.in addition, the local wwww.xxx.com cannot be changed to another domain name for other special reasons