GitLab Continuous Integration with Capistrano 4

.gitlab-ci.yml

image: ruby:2.4
stages:
  - deploy
  
deploy_staging:
  environment: staging
  stage: deploy
  script:
    - which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )
    - eval $(ssh-agent -s)
    # Add the SSH key stored in SSH_PRIVATE_KEY variable to the agent store
    - ssh-add <(echo -e “$SSH_PRIVATE_KEY”)
    - gem install capistrano
    - cap staging deploy
  only:
    - develop

deploy:
  environment: production
  stage: deploy
  script:
    - which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )
    - eval $(ssh-agent -s)
    # Add the SSH key stored in SSH_PRIVATE_KEY variable to the agent store
    - ssh-add <(echo -e “$SSH_PRIVATE_KEY”)
    - gem install capistrano
    - cap staging deploy
  only:
    - master

I think that in line 27 You should have cap production deploy