echo multi-line string to a file

Question

How can I create a .gitignore file and add:

/node_modules
.DS_Store
.env

all in one command line?

I know I can do this: echo ".DS_Store" >> .gitignore

Answer 1

The classic way to do this is using a HEREDOC (see man bash)

cat - <<EOF >> .gitignore
/nodemodules
.DS_Store
.env
EOF