Add .gitlab-ci.yml

image: fpco/stack-build:lts-14.6

variables:

  STACK_ROOT: "${CI_PROJECT_DIR}/.stack"

cache:

  paths:

    - .stack-work

    - .stack

build:

  stage: build

  script:

    - stack build

    - cp $(stack path --dist-dir)/build/polygon/polygon .

  artifacts:

    paths:

      - polygon