[FEAT] Multiple DNS validation in the same container

[SirLouen]

Is this a new feature request?

• I have searched the existing issues

Wanted change

Currently, only one DNS validation can be set up per Swag container

Ideally multiple DNS of multiple providers but minimally both HTTP and DNS validation of one provider at the same time.

Reason for change

In the case we would like to use different DNS validation on the same server, there will be issues running multiple Swag containers at once with conflicting ports, unless I get multiple IP for the server

The thing here is that, say for example, we are using multiple CDN providers for different domains running under the umbrella of Swag. For example, Cloudflare and Bunny
. Some of these only let you use their CDN if you use their DNS.

Moreover, let's say we have a domain using cloudflare and a subdomain of another domain in the same server. We cannot use DNS validation for the CF one and HTTP for the subdomain

I'm being inspired by the Caddy system where I have some caddy servers with this kind of configs (but I've always prefered to stick to nginx)

Proposed code change

No response

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