Upload files to server after pushing with GitLab CI

GitLab CI/CD
1

I try to upload files automatically to a remote server with SSH after pushing to staging branch.

I have the folling GitLab CI command in my .gitlab-ci.yml:

stages:
  - deploy

deploy_staging:
  stage: deploy
  image: tetraweb/php:7.1
  before_script:
    - 'which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )'
    - mkdir -p ~/.ssh
    - eval $(ssh-agent -s)
    - '[[ -f /.dockerenv ]] && echo -e "Host *\n\tStrictHostKeyChecking no\n\n" > ~/.ssh/config'
    - ssh-add <(echo "$DD_PRIVATE_KEY")
    - apt-get install rsync
  script:
    - ssh -p22 ssh-xxxx@xxxxx.com "mkdir -p /website.com/_tmp"
    - rsync -rav -e ssh --exclude='.git/' --exclude='.gitlab-ci.yml' --delete-excluded ./ ssh-xxxx@xxxxx.com:/xxx.com/_tmp
    - ssh -p22 ssh-xxxx@xxxxx.com "mv /website.com/yyy/ /website.com/_old && mv /website.com/_tmp /website.com/yyy/"
    - ssh -p22 ssh-xxxx@xxxxx.com "rm -rf /website.com/_old"
  only:
    - staging

The GitLab Job says Job succeeded … but the files were not uploaded…in fact nothing happens… but I get no error message or warnings…

Is there an error in my CI file?