This gists is just a compendium of usefull NPM commands commonly used in different languages.
This will ask you a bunch of questions, and then write a package.json for you.
It attempts to make reasonable guesses about what you want things to be set to, and then writes a package.json file with the options you've selected.
If you already have a package.json file, it'll read that first, and default to the options in there.