.gitconfig not working correctly?

Question

git

[alias]
  co = checkout
  ci = commit
  st = status
  br = branch
  coo = log --pretty=format:'%h %ad | %s%d [%an]' --graph --date=short
  type = cat-file -t
  dump = cat-file -p

alias do not work when including this file in the root directory of the project, what's wrong?

Answer 1

What file? To which directory?
gitconfig can be in three places:

/etc/gitconfig
~/.gitconfig
/path/to/project/dir/.git/config

Upd. Read this .
Upd2. Here is what is specific to your question.