robots.txt

create robots controller that checks (using an env) if it's on production or not. By default it allows everything, and you have to specify to disallow staging and acceptance. the reason for this is, when you make a mistake it let's severe than when you disallow on default and forget to set production env
Merge branch 'refs/heads/master' into feature/robot.txt
add allow, disallow and controller for robots
env vars are a string
bump version