This document describes the procedure for creating a Let's Encrypt certificate on macOS. To verify the functionality of the created certificate, we will install it on Windows Server 2025 and confirm its operation.

When implementing websites, dark mode is rarely used for corporate sites, but we'll implement it for other common cases using Next.js and Tailwind CSS.

Here we present a digest of the process of setting up a blog using content migrated from WordPress, combined with Next.js.