Nginx config - Rails

gistfile1.nginxconf

upstream backend {
  server 127.0.0.1:9000;
}

log_format default_log '$host $remote_addr [$time_local] "$request" $status $request_length "$http_referer" "$http_user_agent" $request_time';

server {
    listen 80;
    server_name _; # all accept
    access_log /var/log/nginx/access.log default_log;

    location ~ ^/assets/ {
        root /var/www/dashboard/current/public;
        gzip_static on; # to serve pre-gzipped version
        expires 1y;
        add_header Cache-Control public;
        add_header ETag "";
        break;
    }

    location / {
        proxy_set_header HOST $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header X-Forwarded-Proto $http_x_forwarded_proto;
        proxy_pass http://backend;
        proxy_redirect off;
    }
}