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Caddy with Cloudflare DNS

Very simple docker image that builds Caddy with the Cloudflare DNS plugin so Caddy can handle Cloudflare DNS-01 challenges. I run multiple instances of Caddy across several servers, and I figured having to rebuild it locally on every update was silly. So I put it in the GitHub Container Registry.

Usage

Just set an environment variable containing a Cloudflare API token with Zone.Zone and Zone.DNS permissions for your domain. Here is an example docker-compose with the values that would be different from an ordinary caddy setup:

services:
    caddy:
        image: ghcr.io/emberquill/caddy:latest
        environment:
            CLOUDFLARE_API_TOKEN: <CLOUDFLARE API TOKEN>
(Truncated)

Then in your Caddyfile, add tls blocks to whichever domains need them as shown in the example in the Cloudflare plugin repo, using the environment variable you previously configured:

your.domain.name:443 {
    reverse_proxy some_container:80

    tls {
        dns cloudflare {env.CLOUDFLARE_API_TOKEN}
    }
}