location /socket {
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_http_version 1.1;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $host;
    proxy_pass http://127.0.0.1:8081/$is_args$args;
    proxy_read_timeout 86400s;
    proxy_send_timeout 86400s;
    proxy_redirect off;
}