Don't crop news images

Right now all news images have the same height and width, and when it does not match the container (which it rarely does), it gets cropped.
The following needs to be fixed:
- set `objectFit` on the image component to `"contain"` (see [reference](https://nextjs.org/docs/app/api-reference/components/image#reference))
- Match the image width to its container. Probably easiest using [fill](https://nextjs.org/docs/app/api-reference/components/image#fill) and a div