How to add NodeJS code examples

Trying to add NodeJS code examples, and there are no option. So had to select JS as type. But in that way, I'm not being able to write any instruction on how to install the package. Same for Python, Java and other languages. There should be way to explicitly say, how the dev is going to include/install the package into their system.

Please let me know, if there is any way to do this, that I might have missed or any wayaround.
Thanks in advance, even if there is no way to do so, please do let me know any ideas on how to solve this issue with existing system.