Support HTTP01 DNS resolvers for cert-manager

[aabedraba]

There are two ways for Cert Manager to do the certificate resolution:

• DNS01: cert manager gets a token created from the DNS provider that allows it to put a record that solves the TLS challenge
• HTTP01: this is in case the DNS provider isn't supported by cert manager, a file from the gateway should be exposed on a specific path that the ACME provider can then use to solve the TLS callenge.

Currently we've a workflow that can work with DNS01 resolvers, as these are automatic.

As a user, I'd like to be able to use HTTP01 certificate resolution with Kusk Gateway.

Reference:

• https://letsencrypt.org/docs/challenge-types/
• https://cert-manager.io/docs/configuration/acme/

[mbana]

I'll expand on this further but have you considered https://zerossl.com/.