need --no-sandbox chromium flag for running watsjs on CI as non-root
need --no-sandbox chromium flag for running watsjs on CI as non-root

Signed-off-by: Jamie Klassen <d740210502544aa0776b92978c6db85774130b86@pivotal.io>

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse