You could find out about the way we do it at https://github.com/madnificent/docker-ember but I would not if I were you.
The real risk, today at least, does not seem utterly huge. Jumping in this rabbit hole of containers is another topic in itself. I suggest continuing your learning as you do now and maybe revisit this later. You will learn faster that way.
Feel free to check what we did on the link above and ask questions later or whenever you feel ready for this topic.
Looks good to me.
docker-ember largely automates such a setup with specific mounts for linking node modules from other folders, being able to bind to localhost for when you run the backend on your own machine, and exposing ports for livereload. May include other secret sauce. Some of that is closely tied to EmberJS.
I’m a fan of using tools you understand. What you show here is comprehensible and sufficient for now👌