* add GitHub workflow to build all targets, upload/publish all artifacts
  * deb, rpm, tgz of source
  * Docker container on DockerHub, GitHub Container Repository (ghcr.io)
    * containers could have multiple tags as in `latest` and `1.0.0`
* build windows MSYS2
* formatting
* lint
* security audits
* Gitpod
* recorded ascii demo
* README.md
  * build and other badges

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nix flake show
nix flake show --json | jq  '.packages."x86_64-linux"|keys[]'| xargs -I {} nix build .#{}