nginx yesod setup as reverse proxy

nginx-default

upstream yesod {
        server 127.0.0.1:3000;
        keepalive 8;
}

# the nginx server instance
server {
        listen 0.0.0.0:80;
        server_name haskell-serbia.com;
        access_log /var/log/nginx/access_yesod.log;
        error_log /var/log/nginx/error_yesod.log;

        location / {
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $http_host;
            proxy_set_header X-NginX-Proxy true;

            proxy_pass http://yesod/;
            proxy_redirect off;
        }

        location /excluded {
            return 403;
        } 
}

To get the IP headers forwarded by nginx, to be logged by Yesod in production, I needed to do export YESOD_IP_FROM_HEADER=true. Thank you.