html

https://code.i-harness.com/es/q/44667e
https://riptutorial.com/es/node-js/example/32616/notificacion-web
https://github.com/felixge/node-formidable
https://www.npmjs.com/package/jest
https://www.npmjs.com/package/multer
https://www.npmjs.com/package/composable-middleware
https://www.npmjs.com/package/lusca
https://www.npmjs.com/package/method-override
https://www.npmjs.com/package/https-proxy-agent
https://www.npmjs.com/package/nodemailer
https://www.npmjs.com/package/sms-splitter
https://converssage.com/
https://www.twilio.com/pricing
https://pushjs.org/docs/quick-start
https://github.com/Nickersoft/push.js
https://www.npmjs.com/package/push.js
https://facundoolano.wordpress.com/2014/10/11/better-authentication-for-socket-io-no-query-strings/
https://www.npmjs.com/package/socketio-auth