Deploy in gitlab ci job with ansible

gitlab-ci-ansible.yml

deploy:
  image:
   name: stefanotroia/ansible:latest
  stage: deploy
  script:
    - printf "[ci_group]\n $SSH_SERVER    ansible_ssh_user=$SSH_USER \n" > /etc/ansible/hosts
    - cp $SSH_KEY key.pem && chmod 600 key.pem
    - eval `keychain --eval` > /dev/null 2>&1
    - ssh-add key.pem
    - ansible-playbook $CI_PROJECT_DIR/ansible-scripts/deploy.yml
  only:
    - development
    - staging