1/ Option used for apt installation are not optimum, so I propose to add option "--no-install-recommends".
When using this option the package "ca-certificates" is not automatically installed (libcurl dependency), but curl commands which downloads from github with https protocol will fail, so add it.

2/ use the openssh-client package instead of ssh which is a metapackage for installing openssh-client and openssh-server.
openssh-server is not needed on a docker container, so this change

3/ use a more tiny package version of vim : vim-tiny instead of vim

For the record :
I am not sure it is a so good idea to install nano and vim in a docker image which contains the visual studio code editor, so another editor. You should probably think about it