route different proxy based on subdomain request in nginx

Question

I have one dedicated server in that server I deployed 5 nodejs application.

domain name: www.nnd.com
dedicated server ip: xxx.xx.x.60

I had domain which is pointed to my dedicated server ip.

sub domains are :

app1.nnd.com pointed to xxx.xx.x.60
app2.nnd.com pointed to xxx.xx.x.60
app3.nnd.com pointed to xxx.xx.x.60
app4.nnd.com pointed to xxx.xx.x.60
app5.nnd.com pointed to xxx.xx.x.60

now in nginx configuration file based on the subdomain I need to route proxy. Example:

{
    listen:80;
    server_name:xxx.xx.x.60
    location / {
        #here based on subdomain of the request I need to create proxy_pass for my node application 
    }
}

Is there any condition and how can I get the original domain name from proxy header?

Answer 1

create a virtual host for each

server {
  server_name sub1.example.com;
  location / {
    proxy_pass http://127.0.0.1:xxxx;
  }
}
server {
  server_name sub2.example.com;
  location / {
    proxy_pass http://127.0.0.1:xxxx;
  }
}

And go on, change the port number to match the right port.