Hello,
if someone is curious about Neos running on a Caddy Webserver, yes it is and it runs very smoothly 
If some needs a sample config for caddy here it is:
All the values are samples, we are currently working and testing with.
http://neos.local http://neos2.local http://neos3.local {
tls off
root /Path/to/Neos/Neos/Web
fastcgi / 127.0.0.1:9002 php {
env FLOW_REWRITEURLS 1
env FLOW_CONTEXT Production
env PHP_VALUE "display_errors=off
error_log=/var/log/fpm-php.www.log
memory_limit = 512M
post_max_size=256M
log_errors=on
upload_max_filesize=256M
expose_php=off"
}
log /Path/to/logfile/std.log
errors /Path/to/Errorlog/err.log
rewrite / {
to {path} {path}/ /maintenance.html /index.php
}
# basicauth / username password
}