我正在使用来自DockerHub的外部Docker镜像。
在每一步中，dockerimage都会一次又一次地从dockerhub中提取。是的，这是所需的工作流程。
我的问题是我们能不能缓存这个镜像，这样它就不会在每一步都从dockerhub中拉取了？这个DockerImage不会经常改变，因为它只预装了node和meteor。
那么可以缓存Docker镜像吗？
原始bitbucket-pipeline.yml

image: tasktrain/node-meteor-mup

pipelines:
  branches:
    '{develop}':
      - step:
          name: "Client: Install Dependencies"
          caches:
            - node
          script:
            - npm install
            - npm run setup-meteor-client-bundle
          artifacts:
            - node_modules/**
      - step:
          name: "Client: Build for Staging"
          script:
            - npm run build-browser:stag
          artifacts:
            - dist/**
      - step:
          name: "Client: Deploy to Staging"
          deployment: staging
          script:
            - pipe: atlassian/aws-s3-deploy:0.2.2
              variables:
                AWS_ACCESS_KEY_ID: $AWS_ACCESS_KEY_ID
                AWS_SECRET_ACCESS_KEY: $AWS_SECRET_ACCESS_KEY
                AWS_DEFAULT_REGION: $AWS_DEFAULT_REGION
                S3_BUCKET: $S3_STAGING_BUCKET_NAME
                LOCAL_PATH: 'dist'
                ACL: "public-read"
                DELETE_FLAG: "true"
                EXTRA_ARGS: "--follow-symlinks --quiet"
      - step:
          name: "Server: Build and Deploy to Staging"
          script:
            - cd server
            - mup setup --config=.deploy/mup-settings.stag.js
            - mup deploy --config=.deploy/mup-settings.stag.js --settings=meteor-settings.stag.json

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