This feels less like a guide on hardening Vaultwarden than a guide on why I should be skeptical about it.
https://github.com/dani-garcia/vaultwarden/discussions/1549#...
The upstream also had this issue, which appeared to be closed without a PR:
e.g. You can’t just provide software to people that obtains TLS certs on their behalf: you have no idea how their infra is setup.
Hosting any app on your own infra is a serious skill set.
Restore from backup testing was straightforward. We haven't had any problems w/ the application itself.
I used that that hardening guide for my setup. The one I manage is exposed to the Internet and I'm bringing traffic into it via a reverse proxy.