location = /monit {     
        return 301 https://$host/monit/;
}

location /monit/ {
        rewrite ^/monit/(.*) /$1 break;
        proxy_ignore_client_abort on;
        proxy_pass   http://127.0.0.1:2812;
        proxy_redirect  / /monit/;
        proxy_cookie_path / /monit/;
        proxy_set_header Host $host;
}