fix: mrsk deploy fails when traefik config is empty

lib/mrsk/commands/traefik.rb

@@ -46,7 +46,8 @@ class Mrsk::Commands::Traefik < Mrsk::Commands::Base
   end
 
   def port    
-    "#{config.raw_config.traefik.fetch("host_port", "80")}:80"
+    traefik_port = config.raw_config.dig(:traefik, "host_port") || 80
+    "#{traefik_port}:80"
   end
 
   private