No, the reason is that I host a lemmy instance and when updating it the script deletes the current nginx configuration file.

DNS records will prevent it at least for small users. In the case that you are like one of those big nostr only sites you’ll have no issue with a script deleting your config.

I’ve also been looking into this. I hope someone some day will make it possible to do it with DNS reccords instead of .well-known files