add demo and use caddy example for laravel

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

caddy/Caddyfile

 # Docs: https://caddyserver.com/docs/caddyfile
-0.0.0.0:80
-root /var/www/public
-fastcgi / php-fpm:9000 php {
-    index index.php
-}
+0.0.0.0:80 {
+    root /var/www/public
+    fastcgi / php-fpm:9000 php {
+        index index.php
+    }
 
-# To handle .html extensions with laravel change ext to
-# ext / .html
+    # To handle .html extensions with laravel change ext to
+    # ext / .html
 
-rewrite {
-    r .*
-    ext /
-    to /index.php?{query}
-}
-gzip
-browse
-log /var/log/caddy/access.log
-errors /var/log/caddy/error.log
-# Uncomment to enable TLS (HTTPS)
-# Change the first list to listen on port 443 when enabling TLS
-#tls self_signed
+    rewrite {
+        to {path} {path}/ /index.php?{query}
+    }
+    gzip
+    browse
+    log /var/log/caddy/access.log
+    errors /var/log/caddy/error.log
+    # Uncomment to enable TLS (HTTPS)
+    # Change the first list to listen on port 443 when enabling TLS
+    #tls self_signed
 
-# To use Lets encrpt tls with a DNS provider uncomment these
-# lines and change the provider as required
-#tls {
-#  dns cloudflare
-#}
+    # To use Lets encrpt tls with a DNS provider uncomment these
+    # lines and change the provider as required
+    #tls {
+    #  dns cloudflare
+    #}
+}
+laradock.demo {
+    root /var/www/public
+}