Skills to learn to become a good junior dev?

I've been working to become a junior dev for a while now. I started with C++ but eventually switched to JavaScript (Node, specifically, cuz web dev and me just don't get along). I have a few personal projects under my belt, which all use various different things like Koa, Nunjucks, Axios, Docker compose, CI/CD pipelines, and unit tests, with a little Mongo stuff. I've been told I need more skills to be a junior dev, but I haven't known what other useful skills to learn. Does anyone have any suggestions or pointers?