I'm not aware of any npm monorepo support but I was just using some packages from npm and thought I can also use its 'script' feature to up-keep the repo. And

I'm not aware of any npm monorepo support but I was just using some packages from npm and thought I can also use its 'script' feature to up-keep the repo. And to attach to a container, you should be able to just run 'Attach to running container' from command palette after you bring it up