Add caddy ddns module config

caddy/Caddyfile

@@ -10,3 +10,13 @@ seer.nvengal.com {
 watch.nvengal.com {
   reverse_proxy jellyfin:8096
 }
+
+{
+  dynamic_dns {
+    provider cloudflare {env.CLOUDFLARE_API_TOKEN}
+    domains {
+      nvengal.com @
+    }
+    check_interval 5m
+  }
+}