How do I add an empty directory to a git repository
You can't commit empty folders in git. If you want it to show up, you need to put something in it, even just an empty file.
For example, add an empty file called .gitkeep to the folder you want to keep, then in your .gitignore file write:
# exclude everything somefolder/* # exception to the rule !somefolder/.gitkeep
Commit your .gitignore and .gitkeep files and this should resolve your issue.