suppose the local host file:
www.test.com 127.0.0.1
Local nginx.config file:
upstream www.test.com {
    server 192.168.10.78:9003 weight=1;
}
upstream static.test.com {
    server 127.0.0.1:8585 weight=1;
}
server {
    listen       80;
    server_name  www.test.com;
    location / {
        proxy_pass http://www.test.com;
    }
    location =/ {
        proxy_pass http://static.test.com;
    }
} what happens if I type www.test.com enter in my browser now? 
 1. Nginx is represented to  http://192.168.10.78:9003; 
 2. Go host and be represented to 127.0.0.1 
 3. First, nginx is represented to  http://www.test.com and then ho.  
 what happens if I type enter enter in the browser now? 
 I didn"t understand ngin very well, but now it"s even more messy with host; can anyone explain it? Or is my file wrong? 
