Travis deploy with SSH

.travis.yml

language: node_js
node_js:
  - "10.15"
install:
  - npm install
cache:
  directories:
  - node_modules
script:
  - npm test
  - npm run build
#after_success:
#  - echo $(<$TRAVIS_BUILD_DIR/build/VERSION)
#  - echo $(<$TRAVIS_BUILD_DIR/build/BRANCH)
notifications:
  email:
    on_pull_requests: false
    on_success: change
    on_failure: change
#  slack:
#    on_success: change
#    on_failure: change
#    on_pull_requests: false
#    rooms:
#    - secure: XXXXXXXXXXXX
branches:
  only:
  - master
  - /^v\d+\.\d+(\.\d+)?(-\S*)?$/

addons:
  ssh_known_hosts:
  - 8.888.88.88
  - 8.888.88.89

before_deploy:
  - openssl aes-256-cbc -K $encrypted_13a92b926e32_key -iv $encrypted_13a92b926e32_iv -in deploy_rsa.enc -out deploy_rsa -d
  - eval "$(ssh-agent -s)"
  - chmod 600 deploy_rsa
  - ssh-add deploy_rsa

deploy:
  # Deploy to Testing environment
  - deploy:
    provider: script
    skip_cleanup: true
    script: rsync -vrh --delete-after $TRAVIS_BUILD_DIR/build/* $USER_NAME@8.888.88.88:/var/www/sensor-ui
    on:
      branch: master

  # Deploy to Staging environment (release)
  - deploy:
    provider: script
    skip_cleanup: true
    script: rsync -rh --delete-after --quiet $TRAVIS_BUILD_DIR/build/* $USER_NAME@8.888.88.89:/var/www/sensor-ui
    on:
      tags: true
      branch: master