create gitignore for node_modules code example

Example 1: how to gitignore node modules

touch .gitignore  //to create a .gitignore if you dont have one
echo "node_modules/" >> .gitignore //this adds node_modules to gitignore
cat .gitignore //checks what files you have in your gitignore

Example 2: ignore node_modules

.gitignore
node_modules