Update letsencrypt_renew_hook.sh to note that this script won't affect anything as it will only help to recreate ispserver.pem file only if Let's Encrypt certificates are there.

Update letsencrypt_post_hook.sh to check for web server if any exist because we cannot close http port 80 in case the web server is installed later. We also need to restart it if web server exist since it is close in pre hook.

Update letsencrypt_pre_hook.sh to stop web server if any exist because standalone needs to use http port 80 in case the web server is installed later.

updating the website title by the cronjob shouldn't be necessary as it should get updated by the server plugin

Generate always new key 
use rsa 4096 like in certbot