there a number of different ways to create a node express pug template from an existing html file
https://www.npmjs.com/package/html2pug
- https://html2pug.now.sh/ an online version
- https://html-to-pug.com/ an online version
- https://www.npmjs.com/package/html2pug via npm build
see https://dev.to/osde8info/node-webdev-would-be-easier-if-3551 for an npm build example