Rebase on nginx-proxy/acme-companion v2.5.1.
Upstream now supports DNS mode challenge and wildcard domain certificates.
Important note
Upstream syntax for DNS mode challenge is different from ours which will be deprecated at some point in the future. Please update your configurations with upstream syntax. See https://github.com/nginx-proxy/acme-companion/blob/main/docs/Let's-Encrypt-and-ACME.md#dns-01-acme-challenge.