What to upload to github?

Question

GitHub

Hello! please tell me what exactly with this structure should be uploaded to github? I'm new to this business, I'm working with github for the first time)

Question: Is it possible to index, commit and add to the remote repository not files, but a folder with files (the red frame highlights what I added to the remote repository, and the blue one, what not became)
But it got into the repository: 1) The folder confuses. Don't know if this is correct.
2) Are there too many files in the repository, which ones are superfluous?
PS Tell me, how is it removed (selectively) from the repository?

Answer 1

Add unnecessary folders and files to the .gitignore file, which needs to be placed in the root of the project, I would not upload it to github
/node_modules