krzysiaczek/behat repository overview

Modifications covers:

• removing behat user
• replacing reference to /home/behat with just /behat
• different set of dependencies in composer

Details could be reviewed in here: https://github.com/Krzysiaczek/docker-behat⁠

Selenium webdriver didn't work for me in that case so I used Standalone Selenium Java server running on krzysiaczek/selenium.