Fix: Remove invalid rate_limit directive from Caddyfile

- Removed rate_limit directive which is not supported in Caddy
- Caddyfile now uses only valid Caddy directives
- This fixes the configuration error that was preventing Caddy from starting

Caddyfile

@@ -23,15 +23,6 @@ stargirlnails.de {
         Strict-Transport-Security "max-age=31536000; includeSubDomains"
     }
 
-    # Rate Limiting
-    rate_limit {
-        zone static {
-            key {remote_host}
-            events 10
-            window 1m
-        }
-    }
-
     # Gzip-Kompression
     encode gzip