anchor.diff:  steps:
     - command: yarn install && yarn run test
       plugins:
  -      docker#v1.0.0:
  -        image: node
  -        workdir: /app
  +      - docker#v1.0.0:
  +          image: node
  +          workdir: /app
   ```
   
   In its root directory the plugin has a `plugin.yml` that describes what it does, the executables required on the agent machine, and a schema of the plugin’s configuration options:
  
positive.code:     command: test.sh
      parallelism: 25
      plugins:
        docker-compose#v1.0.0:
          run: app
  ```
  
  You can see the [full list of available Buildkite Plugins](https://github.com/search?utf8=✓&q=topic%3Abuildkite-plugin&type=) on GitHub.
  
negative.code:   # Prebuild the app image, upload it to a registry for later steps
    - label: "\:docker\: Build"
      plugins:
        - docker-compose#v1.0.0:
            build: app
            image-repository: index.docker.io/org/repo
  
    - wait
  
  