How to transfer ssl Letsencrypt to a new server correctly?

Question

Debian

I have Certbot released on a Debian ssl Letsencrypt server. I'm moving the site to another server. To avoid downtime, how to transfer an already working certificate? What specific files are needed? Only the ones in the nginx config?
After the move, you just need to forcibly reissue the certificate, and that's it?

Answer 1

When a certificate is reissued, the old ones are not revoked, therefore it is enough just to issue it on a new one, it will remain on the old one.