This tutorial by Lee Robinson on self-hosting Next.js using Docker and deploying it on Fly.io is a great resource for developers. It illustrates how to set up a Next.js app with API routes, leveraging Docker for seamless deployment. The example includes creating a simple blog page and highlights the necessary configurations in the fly.toml file. However, a notable issue regarding the missing sharp dependency for image optimization is mentioned, which could be a potential hurdle for those looking to utilize all Next.js features.