Using certResolver in addition of custom certificate

Hi,

I cannot find how I can use a certResolver (example, cloudflare, let's encrypt, etc.) in addition to a custom certificate for a specific route.

For example, I want to use my custom certificate only for the route my-custom-subdomain.mydomain.com, and Cloudflare for the rest mydomain.com, *.mydomain.com

How can I achieve this ?

No one has ever been confronted to this problem before?