This is the first time I've heard the phrase "twelve-factor app". Although I'm ignorant of this term and docker, it wasn't obvious to me how it violates the co

This is the first time I've heard the phrase "twelve-factor app". Although I'm ignorant of this term and docker, it wasn't obvious to me how it violates the concepts. Which factor does it violate? For reference: http://12factor.net/ http://12factor.net/