How to use a custom subdomain?

Hello. I want to host aapanel to a custom domain, and if possible close the opened ports.

I already have an A, and AAAA record pointing to my server with proxying turned off but when I try to enter the subdomain I get a redirection loop.

I'm also using caddy as the main web server with the following configuration for aapanel

panel.marcelsoftware.dev {
	reverse_proxy :41228
}