Win11 Pro on used lenovo thinkcentre

Docker Desktop

FileBrowser running at 7777:80 in Docker Desktop (7777 was chosen by me to preemptively avoid conflicts)

ATT Router with custom service "Filebrowser" global range 443, TCP, Host Port 443

(443 was chosen by me because I want the site to only be accessible if secure)

Custom firewall exception, tcp, local 7777, Host 443

Filebrowser login page accessible from localhost:7777

Filebrowser login page accessible from http://my_custom_duckdns_domain:7777

Not accessible from https:

Not accessible from external device.

Tried to run Win-Acme, failed.

Tried to run Caddy:

               "Error: loading initial config: loading new config: http app module: start: listening on :80: listen tcp :80: bind: An attempt was made to access a socket in a way forbidden by its access permissions."

caddy is not a docker image

I've been using ChatGPT to help me configure this stuff, it has not been going well. The AI can't remember what it tells me from one question to the next, so you end up in loop after loop of errors.

I ended up deleting the caddyfile because no configuration supplied by ChatGPT worked.

Can anyone help me get this going?

I'd really like to understand how to safely expose the fileserver, but nothing is working.

I already tried nextcloud, and though it looks pretty, the on-board office suite, which I want so you don't have to download a file to view it, will not function because Collabora won't download.

I do not claim to know what I am doing.

I dislike CLI, and Linux frustrates me to no end.

I'm open to any suggestions you all have.