add gitignore file in git code example

Example 1: git add gitignore

$ touch .gitignore

Example 2: how to put files into gitignore

$ echo debug.log >> .gitignore
$ git rm --cached debug.log
rm 'debug.log'
$ git commit -m "Start ignoring debug.log"

Example 3: how to add filer to git ignore

go to the gitignore file, add the name of the file to ignore