設定 domain

A record: 把這個 domain 綁到特定 IP
CNAME: 別名，例如 hello.waynechu.com，hello 就是



https://www.oyag.com/9501/websys


Nginx


/etc/nginx/site-availables/myconfig

```
server {
  listen 80;
  server_name www.example.com;
  location / {
    proxy_pass 127.0.0.1:8000;
  }
}
```

cd /etc/nginx/site-enabled

sudo ln -s /etc/nginx/site-availables/myconfig

https://www.digitalocean.com/community/tutorials/how-to-set-up-nginx-server-blocks-virtual-hosts-on-ubuntu-16-04