Update .gitlab-ci.yml

image: alpine

stages:

  - setup

  - test

  - deploy

variables:

 GIT_SUBMODULE_STRATEGY: normal

prepare:

  stage: setup

  script: 

    - curl --header "PRIVATE-TOKEN:$CI_DOC_TOKEN" https://forge.etsi.org/rep/api/v4/projects/592/repository/files/asn2md.py?ref=master | python -c "import sys, json, base64; open('asn2md.py', 'wb').write(base64.b64decode(json.load(sys.stdin)['content']))"

    - mkdir -p asn1c 

    - git clone https://github.com/fillabs/asn1c.git asn1c-build

    - cd asn1c-build && autoreconf -iv && ./configure --prefix=./asn1c && make && make install

    - rm -rf asn1c-build

  cache:

    key: asn1c

    when: always

    paths:

      - asn1c/

validate:

  stage: test

  script: make validate

  cache:

    - key: asn1c

      policy: pull

      paths:

        - asn1c/

    - key: iso

      when: 'always'

      paths:

        - iso/*

  only: