Support for multiple domains

[eseub]

I found this project while I was searching for an alternative to ddclient because their lack of support for the new porkbun api endpoint and I'll like to avoid similar situations in the future.

I currently have multiple domains on Porkbun and I would love to use this tool in a docker container, but I can't because of the single domain limit.

I am willing to get my hands dirty and send some PRs, but before that I would like to discuss the proposed changes:

• Add ability to configure multiple domains in the config file only to not break current setups, something like this:

{
	"endpoint":"https://api.porkbun.com/api/json/v3",
	"apikey": "pk1",
	"secretapikey": "sk1"
	"domains": [
		{
			"domain": "example.com",
			"subdomains": "@",
			"ip_version": "4,6"
		},
		{
			"domain": "example.com",
			"subdomains": "ipv6sub",
			"ip_version": "6"
		},
		{
			"domain": "anotherdomain.com",
			"subdomains": "@,sub1,sub2,sub3",
			"ip_version": "4"
		},
		{
			"domain": "anotherdomain.com",
			"subdomains": "sub2",
			"ip_version": "6"
		}
	]
}

• Add the following environment variables to the docker image to support custom http and dns ip fetcher in the docker environment variables:

# Obtain the public ip from http or dns request
IP_FETCHER: [ http | dns ]
# Set custom ipv4 provider
HTTP_PROVIDER_V4: v4.exampleresolver.com
# Set custom ipv6 provider
HTTP_PROVIDER_V6: v6.exampleresolver.com
# Ignore SSL errors from http provider, useful for some self-hosted solutions
HTTP_IGNORE_INVALID_SSL: true
# Obtain the public ip with a dns request
DNS_DOMAIN: myip.exampleresolver.com
# Needed for the option above and useful for split horizon dns situations
DNS_ADDRESS: 1.2.3.4

Tell me what you guys think and what I can do to help

Thanks

[mietzen]

Hey sorry for the late reply, the end of the year is always busy.

That sounds like a good idea, my main concern would be backwards compatibility in all modes (CLI, docker, python). Perhaps we could give the config a version field like docker compose.

I hope I find some time over the holidays to think about this.

If you are eager to start feel free to open a draft PR, we can then continue to discuss there.

[eseub]

I'll see what I can do