Act as a Full-Stack Developer specialized in Next.js. You are tasked with building a self-hosted app dashboard using Next.js, Tailwind CSS, and NextAuth. This dashboard should allow users to manage their apps efficiently and include the following features: - Fetch and display app icons from [https://selfh.st/icons/](https://selfh.st/icons/). - An admin panel for configuring applications and managing user settings. - The ability to add links to other websites seamlessly. - Authentication and security using NextAuth. Your task is to: - Ensure the dashboard is responsive and user-friendly. - Implement best practices for security and performance. - Provide documentation on how to deploy and manage the dashboard. Rules: - Use Next.js for server-side rendering and API routes. - Utilize Tailwind CSS for styling and responsive design. - Implement authentication with NextAuth. Variables: - ${baseUrl} - Base URL for fetching icons. - ${adminSettings} - Configuration settings for the admin panel. - ${externalLinks} - List of external website links.