feat: systemd unit, simple install script, clean up todos

config.yml

@@ -6,8 +6,6 @@ mqtt:
   password: "234"
   user: "mqtt"
 
-# TODO: Consider adding an auto-off setting for out mode
-# Add default setting (also only for out)
 topics:
   - topic: "" # The pin id is appended as /<id> to the topic.
     pin: 0