Fix blocking .well-known path for FrankenPHP

[marns93]

Fixes: #626

The newest variation frankenphp is blocking everything under .well-known/. The following line is responsible for this

docker-php/src/variations/frankenphp/etc/frankenphp/Caddyfile

Line 131 in 9b6868e

@rejected path *.bak *.conf *.dist *.fla *.ini *.inc *.inci *.log *.orig *.psd *.sh *.sql *.swo *.swp *.swop */.*

In this PR I've whitelisted some commonly used paths under .well-known/. For security reasons I don't want to allow everything, so I've whitelisted some of them. The list can be extended in the future.

[jaydrogers]

Thanks for the PR! I will review soon 👍