title: Is it possible to use multiple docker images in bitbucket pipeline?
body: <p>I have this pipeline file to unittest my project:</p>
  
  <pre><code>image: jameslin/python-test
  
      pipelines:
        default:
          - step:
              script:
                - service mysql start
                - pip install -r requirements/test.txt
                - export DJANGO_CONFIGURATION=Test
                - python manage.py test
  </code></pre>
  
  <p>but is it possible to switch to another docker image to deploy?</p>
  
  <pre><code>image: jameslin/python-deploy
  
      pipelines:
        default:
          - step:
              script: 
                - ansible-playbook deploy
  </code></pre>
  
  <p>I cannot seem to find any documentation saying either Yes or No.                               </p>