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Why the blog lives in markdown
A tiny blog should stay close to the code, the deploy flow, and the product thinking it is documenting.
For a small site like this, a database-backed blog would be more ceremony than benefit. Markdown keeps the writing versioned, reviewable, and easy to edit while the product is still moving quickly.
It also keeps the publishing model honest. If a post is only meant to be a few paragraphs, the tooling should feel lightweight enough to encourage that kind of writing.