A bash script would have to automatically install all the dependencies. Over time, there is a growing chance that some of the versions required will conflict wi

A bash script would have to automatically install all the dependencies. Over time, there is a growing chance that some of the versions required will conflict with whatever is already installed on the machine, and someone will have to go in and fix them... then fix them in a way that it works on everybody's machines. With docker, you can just ignore all that. As long as there is a single person capable of updating the dependencies on a single machine with docker, it'll work the same everywhere, always.