Upgrading Rancher's Let's encrypt for ACMEv2 support


I’am using janeczku/rancher-letsencrypt but since ACMEv1 is deprecated, it doesn’t work anymore, i have this classic message

30/01/2020 16:29:04time="2020-01-30T15:29:04Z" level=fatal msg="LetsEncrypt client: Failed to register account: acme: Error 403 - urn:acme:error:unauthorized - Account creation on ACMEv1 is disabled. Please upgrade your ACME client to a version that supports ACMEv2 / RFC 8555. See https://community.letsencrypt.org/t/end-of-life-plan-for-acmev1/88430 for details."

I saw there’s is updated image to address this issues and in particular https://github.com/TrueCarry/rancher-letsencrypt/tree/acme-v2

But since i am new at Rancher, i can figure how to use this image instead the old one ?

Can someone help me to understand how it works ?

I am using Rancher 1.6.29

Thanks a lot

There seem to be instructions in this comment: https://github.com/janeczku/rancher-letsencrypt/pull/114#issuecomment-554138971