I'm interested as to why junior developers even need to learn Docker. I'd say learning Docker would be a "nice-to-have," but you can go years, or even forever, without having to deal with it, or even having a need for it. I'm not saying learning Docker is fruitless, just that Junior Developers might not get enough out of learning Docker to put it in good use.
As for NoSQL. I'd say that definitely should be on the roadmap. I've assumed that they've already learned RDBMS, but knowing when to use the two is essential. Most companies now are working with data lakes and unstructured data (e.g. user and session data). Knowing how to get around that flexibility, how to structure your business logic and models, and what tool to pick (i.e. Redis for caching), etc. goes alongside NoSQL knowledge.
Using docker force you to declare step by step what you need to build/use your code. If you combine that with good CI/CD, that easier to provides help to the junior developer if you can quickly reproduce the environment.
I had a bad experience with a project that I was assigned to "help". The build steps documented used incompatible lib version. It's hard to help if you can't even build/run their codes.
As for NoSQL. I'd say that definitely should be on the roadmap. I've assumed that they've already learned RDBMS, but knowing when to use the two is essential. Most companies now are working with data lakes and unstructured data (e.g. user and session data). Knowing how to get around that flexibility, how to structure your business logic and models, and what tool to pick (i.e. Redis for caching), etc. goes alongside NoSQL knowledge.