Selenium: Create selenium-daily npm script
Selenium: Create selenium-daily npm script

The script is needed for the new Docker-based Jenkins jobs (running daily and targeting beta cluster).

Bug: T188742
Change-Id: I1cca2398857c693d9a8f4dbbb2cf9d25b5124f83

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo