Best practice for maven release stage in gitlab ci?

Question

Maven

How do you describe the maven release stage in gitlab ci ?
I have it like this. But I think that it is possible to optimize/reduce/improve the code.

release:
  stage: release
  image: maven:3.5.3-jdk-8
  script:
    - apt-get install -y openssh-client git
    - mkdir -p ~/.ssh
    - echo "$SSH" | tr -d '\r' > ~/.ssh/id_rsa
    - chmod 600 ~/.ssh/id_rsa
    - eval "$(ssh-agent -s)"
    - ssh-add ~/.ssh/id_rsa
    - ssh-keyscan gitlab >> ~/.ssh/known_hosts
    - echo -e "Host *\n\tStrictHostKeyChecking no\n\n" > ~/.ssh/config
    - git config user.name $PUSH_USER_NAME
    - git config user.email $PUSH_USER_EMAIL
    - git remote set-url origin $SSH_GIT_URL
    - git checkout master
    - git reset --hard origin/master
    - mvn $MAVEN_CLI_OPTS clean release:prepare -Dresume=false -DautoVersionSubmodules=true -DdryRun=false -Dmaven.test.skip=true -DskipITs -DscmCommentPrefix="Release pom [ci skip]"
  only:
    - master