Upgrade connections to https
https://fly.io/blog/always-be-connecting-with-https/
What’s behind serving static files
https://fly.io/blog/serve-small-with-fly-io-and-gostatic/
Preview / PR environments
https://fly.io/docs/blueprints/review-apps-guide/
https://community.fly.io/t/pull-request-previews-and-preview-environments/4120
https://github.com/superfly/fly-pr-review-apps
set up app for private connection via Tailscale
https://tailscale.com/kb/1132/flydotio/
Database
Postgres / Supabase
https://supabase.com/blog/postgres-on-fly-by-supabase