nginx_host

upstream app_server {
    server unix:/app/gunicorn.sock fail_timeout=0;
}

server {
    listen 80;
    location / {
        proxy_pass http://app_server;
        proxy_redirect     off;
        proxy_set_header   Host $host;
        proxy_set_header   X-Real-IP $remote_addr;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Host $server_name;
    }
}