I am not sure which they intended, but the problem is that the comment doesn't match the code: > RAILS_SERVE_STATIC_FILES="true" > RAILS_SERVE_STATIC_FILES -

I am not sure which they intended, but the problem is that the comment doesn't match the code: > RAILS_SERVE_STATIC_FILES="true" > RAILS_SERVE_STATIC_FILES - This instructs Rails to not serve static files That is not what it does when you put `="true"`, nope. In fact both, settings are common. On heroku you typically use `RAILS_SERVE_STATIC_FILES="true"` but put a CDN in front. But other people do false and have eg nginx serving them. If this is what fly.io means you to do... where is the nginx, not mentioned in the tutorial? Whichever they intend to do, their code does not match their narrative of what it does.