Not able to connect my koel server, only with Caddy I obtain something

[lmateovf]

Describe the bug
When entering 192.168.1.39:8000 the server only provides a blank page.

Also when trying to setup Caddy reverse_proxy it almost works [see screenshot], at least it receives the fav icon...

I'm searching on google how to set up caddy with koel and only found this: https://caddy.community/t/dynamic-site-root-from-response-header/6078 .... Just in case it helps, though it seems it is only for CaddyV1 and that it has been resolved in CaddyV2

I have also found the nginx example conf, I don't understand yet all it's parameters...
Maybe you can help understand what is all the problem, or what of this parameters here: php-fastcgi do i have to use...

I'm no developer and maybe I shouldn't be trying to set up this... but I just like the demo server and wanted to build my own... it's a pitty for me...

To reproduce
Steps to reproduce the behavior:

1. Go to your koel unzipped and set up everything, like it's shon in the docs
2. php artisan serve
3. Blank page on firefox

Expected behavior
koel installed and working

Screenshots

Environment

• Koel version [e.g. v6.11.2 Latest]
• OS: [e.g. Ubuntu 22.04.3 LTS x86_64]
• Browser [e.g. Firefox 117.0]
• PHP version [e.g. 8.1.2-1ubuntu2.14 (cli)]
• Node version [e.g. v20.6.0]

Additional context
I only managed to set up my Caddyfile like this, I don't really understand what else is needed

koel.xxx.duckdns.org {
    reverse_proxy 127.0.0.1:8000
}