Fix rate limiting block syntax for caddy-ratelimit plugin

- Use proper rate_limit block syntax with key, rate, and window
- Rate 30 requests per minute for general API
- Rate 5 requests per minute for location submissions
- Should resolve 'wrong argument count' error

scripts/Caddyfile

@@ -53,14 +53,22 @@ yourdomain.com {
     # Rate limiting for API endpoints (requires caddy-ratelimit plugin)
     # General API rate limiting: 30 requests per minute
     @api path /api/*
-    rate_limit @api 30r/m
+    rate_limit @api {
+        key {remote_host}
+        rate 30
+        window 1m
+    }
     
     # Submission rate limiting: 5 requests per minute
     @submit {
         path /api/locations
         method POST
     }
-    rate_limit @submit 5r/m
+    rate_limit @submit {
+        key {remote_host}
+        rate 5
+        window 1m
+    }
 }
 
 # Redirect www to non-www (with HTTPS)