[wiennat]

It can be introduced at many points.

in dev: You can setup dependencies without worrying about underlying os. So it is easier for building a new dev machine, adding a new team member, etc.

in integration test: you can setup multiple integration test environment as long as you have enough resource. Running multiple integration tests without interfering other team members is the major benefit here.

in prod: as you may know, for isolation and horizontal scaling. Easier roll back and update?