title: Google Cloud Build Artifact Command Exception
body: <p>My goal is to use google cloud build to execute a python script and then upload two artifacts to the registry.  When I use this yaml, I can see the two output files in /home/jovyan with permissions 777, but when I point to them with an artifact path, I get an error <strong>CommandException: No URLs matched</strong></p>
  <pre><code>timeout: 9001s #2.5 hour time-out
  options:
    machineType: 'UNSPECIFIED' # 'N1_HIGHCPU_8' # 'E2_HIGHCPU_32'
  steps:
  
  # spin up a docker container to do the scoreboard generation
  - name: 'jupyter/scipy-notebook:notebook-6.4.4'
    entrypoint: 'bash'
    env:
    - 'DOCKER=1'
    args:
    - -c
    - |
      pwd
      whoami
      ls -la /home/jovyan
      ls -la
      python3 scoreboard.py $(git diff --name-only HEAD HEAD~1)
      chmod 777 /home/jovyan/data_out.json
      chmod 777 /home/jovyan/scoreboard_out.md
      ls -la /home/jovyan
  
  # save output json file to cloud storage
  artifacts:
    objects:
      location: gs://gops-results/
      paths:
        - /home/jovyan/data_out.json
        - /home/jovyan/scoreboard_out.md
  </code></pre>