In Chapter 9, we added a hero image to the index page. If you got the image from Unsplash, as recommended, you might notice that the image file is very large. This could result in slow loading times for some users of the site.
Gatsby has plugins that work with an image processing library called Sharp (https://sharp.pixelplumbing.com/) to resize and crop images in various ways at build time. This can be combined with the gatsby-image plugin to create a powerful image processing pipeline.