There are deployment options where you don’t have to manually renew the certs or create a cron job. If you deploy it within NixOS, all this is setup automatically.
I read elsewhere that the auto-renewal didn’t work. You don’t want to use letsencrypt without automation.
We have posted an incident report that explains why the incident happened and what we are working on to prevent it in the future: 2025 07 30 hex outage | Hex.
Thanks for the communication 
Not to worry bro, my hacked-together cronjob is here for you too. 
