Step by step commands to ssh into vps and fire commands

gitlab-ci.yml

stages:
  - sshserver

variables:
  REGISTRY_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA

test:
  image: alpine:latest
  stage: sshserver
  script:
    - echo "Alpine image created!"
    - apk update && apk add openssh-server openssh-client
    - eval $(ssh-agent -s)
    - mkdir -p ~/.ssh
    - chmod 700 ~/.ssh
    - echo "$SERVER_KEY" | tr -d '\r' | ssh-add -
    - echo "$SERVER_KEY" > ~/.ssh/id_rsa
    - chmod 600 ~/.ssh/id_rsa
    - ssh -i ~/.ssh/id_rsa -o "StrictHostKeyChecking no" ${SERVER_USERNAME}@${SERVER_IP} 'echo $HOME'