To run OpenCI, execute the following command: The required files are the GitHub Apps Private Key .pem file and the Firebase service account .json file that you created on the previous page. You will also need your Firebase project ID. 
openci_runner runner --pem-path path-to-pem-file \
  --service-account-path path-to-service-account-json-file \
  --project-id project-id
Running this command will start the OpenCI Runner.