Configuration for the Certbot.Provider.Acme certificate provider.

• :acme_client -- Client implementing use Certbot, e.g. Myapp.Certbot
• :certificate_store -- Module used to store certificates,
• :challenge_store -- Module used to store certificates,
• :logger -- Module to log events, defaults to Certbot.Logger,
• :key_algorithm -- Algorithm used to generate keys for certificates, defaults to {:ec, :secp384r1}. Can also be e.g. {:rsa, 2048}