add demo and use caddy example for laravel

https://github.com/caddyserver/examples/blob/master/laravel/Caddyfile

caddy/Caddyfile

@@ -1,5 +1,5 @@
 # Docs: https://caddyserver.com/docs/caddyfile
-0.0.0.0:80
+0.0.0.0:80 {
     root /var/www/public
     fastcgi / php-fpm:9000 php {
         index index.php
@@ -9,9 +9,7 @@ fastcgi / php-fpm:9000 php {
     # ext / .html
 
     rewrite {
-    r .*
-    ext /
-    to /index.php?{query}
+        to {path} {path}/ /index.php?{query}
     }
     gzip
     browse
@@ -26,3 +24,7 @@ errors /var/log/caddy/error.log
     #tls {
     #  dns cloudflare
     #}
+}
+laradock.demo {
+    root /var/www/public
+}