Reusable git in Jenkins stages running a docker image

I have a jenkins pipeline and I am running a Nodejs application which uses the docker image node:22.14.0-alpine3.21. I need to run git on the build and deploy stage but git is not available in the docker image so i installed it on each stage that needs it and also authenticate to the git repo on every stage. Is there a way to make this reusable and maintainable so that i install git one time and do the authenticate for all stages without repeating the same steps in each stage i need it . Is there a global stage for git authentication that can be used for all ?

pipeline {
      agent {
        docker {
          image 'node:22.14.0-alpine3.21'
        }
      }
      environment {
        GIT_LOGIN = credentials('git-user')
      }
      stages {
        stage('Install') {
          steps {
            sh 'npm install'
          }
        }
        stage('Run Unit Test') {
          steps {
              sh 'npm run test'
          }
        }
        stage('Run Build') {
              sh '''
                apk add --no-cache git
                git config --global credential.helper store
                echo "http://${GIT_LOGIN_USR}:${GIT_LOGIN_PSW}@test.saubertest.com/healthapp.git" > ~/.git-credentials
                git fetch --tags --force
                npm run build
              '''
          }
        }
        stage('Deploy ZIP') {
          steps {
                sh '''
                  apk add --no-cache git
                  git config --global credential.helper store
                  echo "http://${GIT_LOGIN_USR}:${GIT_LOGIN_PSW}@test.saubertest.com/healthapp.git" > ~/.git-credentials
                  echo "Uploading file with node.js"
                  git fetch --tags --force
                  node execute.js
                '''
          }
        }
    }