Job details page added

I was following “Building a modern website with Contentful and React” https://blog.francium.tech/building-a-modern-website-with-contentful-and-react-ef76c6008133 written by Dinesh Venkatesan, and the first job page is now dynamically generated after fetching data from Contentful.

Nextjs provides its own routing, so I didn’t need to use react-dom-router.