My configure file is server-site nginx for unicorn

nginx.conf

server {
    listen 80;
    server_name www.example.com;
 
    root /home/user_name/web_app/public;
 
    location / {
        try_files $uri @unicorn;
    }
 
    location @unicorn {
        proxy_pass http://unix:/home/user_name/web_app/tmp/sockets/unicorn.sock;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $http_host;
    }
}