- New deploy-nix-site action using Nix flakes
- Runs in nixos/nix:latest container for proper isolation
- Builds using flake.nix, uploads to S3, deploys to Nomad
- Update deploy-site action to install Nomad CLI
- Document both actions in README
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>