nodejs hello module
https://codeburst.io/how-to-create-and-publish-your-first-node-js-module-444e7585b738
$ npm set init.author.name "TJ"
$ npm set init.author.email "bjtj10@gmail.com"
$ npm set init.autor.url "https://github.com/bjtj/nodejs-hello"
$ npm login
$ npm publish
$ yarn
$ yarn test
https://docs.npmjs.com/about-package-readme-files#updating-an-existing-package-readme-file
$ npm version patch
$ npm publish