upstream backend {
    server 127.0.0.1:8000;
}

server {
    listen 80;
    server_name some_app.ru;
    location / {
        proxy_pass http://backend;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    }
}