* package ghr * add nix-based release scripts * refactor CI based on nix tests and release scripts * update stack version in circleci * update makefile * remove docker directory * add Docker Hub description * add README on docker
* package ghr * add nix-based release scripts * refactor CI based on nix tests and release scripts * update stack version in circleci * update makefile * remove docker directory * add Docker Hub description * add README on docker