[NGINX] err_connection_refused

https://www.digitalocean.com/community/questions/help-me-to-fix-err_connection_refused

解決 err_connection_refused

1.關閉防火牆

2.建立相對應的日誌

```

mkdir -p /var/log/nginx/mysitename/

touch /var/log/nginx/mysitename/access.log