My .env.client includes the secret REACT_APP_API_HOST, and when I log it in the client locally as console.log(import.meta.env.REACT_APP_API_HOST), it returns the right value. I deployed the app to Fly.io and also set the client secret REACT_APP_API_HOST, but when I console.log it, it returns undefined.
WHy does Fly.io not read the secret, even though it's been set?