Use own certificates

n some case is needed use own valid certificates. For example if a site is published in a local intranet is not possible work with let's encrypt.
For example a certificate can be added in ./storage/thruster directory? if the certificate is valid thruster can skip the certificate renew?
I havent read anythingh about this in the documentation.

Start by reviewing the certificate handling and renewal entry points, then inspect the proposed ./storage/thruster directory in the issue context. Done should mean that a user can provide a valid certificate for an intranet site and Thruster recognizes it without attempting unnecessary certificate renewal.

Written by the indexing model from the issue text.