By: Michael Lynch <git@mtlynch.io>
Deploy to Fly.io with a Nix-built image instead of a Dockerfile Build the OCI image with dockerTools.streamLayeredImage (no Docker daemon, so it works in the NixCI sandbox) and deploy it via a deploy-to-fly package that pushes to registry.fly.io with skopeo and runs `fly deploy --image`. The same package drives both NixCI auto-deploys on master (nix-ci.nix) and manual `nix run .#deploy-to-fly`. The image adds CA certificates, which the old Alpine image omitted, so the app's HTTPS calls to S3 and SMTP have trust roots. Remove the Dockerfile and the now-unused serve-docker and enable-multiarch-docker scripts. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>