Docker is not only about having reproducible environments. I mostly work as a single developer and I use Docker all the time, mainly because I like the isolatio

Docker is not only about having reproducible environments. I mostly work as a single developer and I use Docker all the time, mainly because I like the isolation properties and because it's super easy to launch certain services (e.g. set up a postgres database). In the past really often I would have issues with conflicting dependencies, that's all gone now. The fact that your shell script did the job for you is obviously a good thing, but maybe that just means that in this particular situation Docker didn't have much to offer for you.