You can use Express as a static file server for a HTML website or SPA.
Express provides a simple sytnax for creating a REST API in Node.js.
How to emails to one or more addresses and including attachments.
Multer allows files and any additional form data to be easily parsed from a request.
You can schedule tasks in Node.js using the node-schedule library.
You only need a one-liner to get the IP address of a user in Node.js.