anchor.diff:  ARG      AIO_SIGNIFICANT_FILES_PATTERN='^(?:aio|packages)/(?!.*[._]spec\\.[jt]s$)'
   ARG TEST_AIO_SIGNIFICANT_FILES_PATTERN=$AIO_SIGNIFICANT_FILES_PATTERN
   ARG      AIO_TRUSTED_PR_LABEL="aio: preview"
  -ARG TEST_AIO_TRUSTED_PR_LABEL="aio: preview"
  +ARG TEST_AIO_TRUSTED_PR_LABEL=$AIO_TRUSTED_PR_LABEL
   ARG      AIO_PREVIEW_SERVER_HOSTNAME=preview.localhost
  -ARG TEST_AIO_PREVIEW_SERVER_HOSTNAME=preview.localhost
  +ARG TEST_AIO_PREVIEW_SERVER_HOSTNAME=$AIO_PREVIEW_SERVER_HOSTNAME
   ARG      AIO_ARTIFACT_MAX_SIZE=26214400
   ARG TEST_AIO_ARTIFACT_MAX_SIZE=200
   ARG      AIO_PREVIEW_SERVER_PORT=3000
  
positive.code: # Image metadata and config
  FROM debian:stretch
  
  LABEL name="angular.io PR preview" \
        description="This image implements the PR preview functionality for angular.io." \
  
negative.code: 
  # Set up the Node.js scripts
  COPY scripts-js/ $AIO_SCRIPTS_JS_DIR/
  RUN yarn --cwd="$AIO_SCRIPTS_JS_DIR/" install --production --frozen-lockfile
  
  
  # Set up health check
  