Add script to convert comments to docs using jsdoc

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Create an npm script `npm docs` that will export all the comments and make it available as html page at `/docs/reference` endpoint. We are already writing jsdoc supported comments, use [jsdoc npm package](https://jsdoc.app/) now to convert those comments to html

I think, following should fix it
1. Install jsdoc as dev dependency `npm install --save-dev jsdoc`
2. Create docs-config.json with source including all js files in the project and destination to be `public/docs/references` (read about jsdoc configs [here](https://jsdoc.app/about-configuring-jsdoc.html#default-configuration-options))
3. Add script in package.json `scripts : { docs : "./node_modules/.bin/jsdoc -c ./docs-config.json"}`
4. Test the route `/docs/references`
5. Look for further improvements in docs navigation and then commit the docs folder

Resources
- [jsdoc command line references](https://jsdoc.app/about-commandline.html)

Start with package.json and the code handling the proposed /docs/references endpoint, then review the JSDoc configuration guidance. Add docs-config.json and the npm docs script so the project’s JavaScript comments generate HTML; done means the generated documentation is served at the requested route and the route is tested.

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