Does Fly give some magic around splitting reads vs. writes to instances? In a typical Django/Rails app I’m not sure how I’d mark some API endpoints as routed to

Does Fly give some magic around splitting reads vs. writes to instances? In a typical Django/Rails app I’m not sure how I’d mark some API endpoints as routed to the single node which is allowed to write to the DB. (I know you guys have some sauce around how you route requests between regions, maybe this falls out of your existing infra here?) I’m just not seeing how I can operate my traditional Django app in this model, other than just having one instance. I’m probably missing something though!