.gitignore

99% of .gitignore files should not be handwritten.

RULE: always use a .gitignore file in a repository.

https://www.gitignore.io/ is your friend. An example for web/javascript development, enter/select:

1. node
2. visualstudiocode
3. angular
4. macos
5. grunt

Use the output for the starting point of a .gitignore file.