domain.com 301 redirection to www.domain.com

server {
        server_name mysite.com;
        return 301 $scheme://www.mysite.com$request_uri;
}
server {
        server_name     www.mysite.com;

        root /usr/share/nginx/mysite.com;
        index index.html index.htm index.php;

        location / {
                try_files $uri $uri/ /index.html index.php;
        }

        location ~ \.php$ {
                fastcgi_split_path_info ^(.+\.php)(/.+)$;
                fastcgi_pass unix:/var/run/php5-fpm.sock;
                fastcgi_index index.php;
                include fastcgi_params;
        }
}