how to initialize a gitignore file code example

Example 1: create gitignore

# creates gitignore file
$ touch .gitignore

Example 2: git add gitignore

$ touch .gitignore

Example 3: .gitignore

node_modules
.DS_Store
.env

Example 4: 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"