How do we exercise browser tests in the pipeline

[diversemix]

Depending on #839 ... this will determine how the tests are run and which tools are used.

From this decision we will need to create tickets for infrastructure and any scripts/actions to run the tests in the way chosen. This will affect the pipelines for the umbrella repo and the staging pipeline.

[erkannt]

• succeeded in running nightwatch from within a container with chrome-webdriver
• testcafe already provides such an image

Ergo: we can probably package our tests into such a container and use it for testing in umbrella, staging and production.

• k8s has definitions for container based jobs
• helm has a hooks for test or parts to run after a release
• how to tie a browsertest-container into automated releases, monitoring, logging and alerting will require further discovery

[erkannt]

Created #865 and #867