Nginx configration (Modem or Router web interface )

I try to develop modem or router web interface.

• I choose the web server nginx

• I try to configure when type the browser 192.168.1.1 open that web interface

     server {
         listen 80 ;
  
         server_name _ 192.168.1.1;
  
         root /var/www/myModem;
         index index.html;
  
         location / {
             try_files $uri $uri/ =404;
     }}
  

That configration is not working.

How can I configure that ?