Traefik is a PITA.

Caddy all the way. If you build it with Docker support (or grab the prebuilt), you can use docker container names to reverse proxy using names instead of any IP addresses or ports. It's nice because if the IP updates, so does caddy. All automatically.

Here's what my caddyfile looks like;

{
        acme_dns cloudflare {key}
}

domain.dev {
        encode zstd gzip
        root * /var/www/html/domain.dev/
        php_fastcgi unix//run/php/php8.1-fpm.sock
        tls {
                dns cloudflare {key}
        }
}
*.domain.dev {
        encode zstd gzip
        tls {
                dns cloudflare {key}
        }
        @docker host docker.domain.dev
        handle @docker {
                encode zstd gzip
                reverse_proxy {portainer}
        }
        @test host test.domain.dev
        handle @test {
                encode zstd gzip
                reverse_proxy 127.0.0.1:10000
        }
        @images host i.domain.dev
        handle @images {
                encode zstd gzip
                reverse_proxy 127.0.0.1:9002
        }
        @proxy host proxy.domain.dev
        handle @proxy {
                encode zstd gzip
                reverse_proxy proxy
        }
        @portal host portal.domain.dev
        handle @portal {
                encode zstd gzip
                reverse_proxy portal
        }
        @ping host ping.domain.dev
        handle @ping {
                encode zstd gzip
                respond "pong!"
        }
}

DNS hosted by cloudflare but because caddy handles ACME certs, all the subdomains automatically get SSL.