Pressure-drop alerts with n8n + ntfy: a self-hosted storm warning

Wiring a barometer feed into n8n, computing 3-hour deltas, and pushing notifications before the front arrives.

What this post covers

This is placeholder body content for the EmDash + Astro build. Richard will rewrite it with the real write-up — code, photos, and the parts that actually broke.

Placeholder draft — not final copy. Seeded from blog-design.html to exercise the layout and Portable Text rendering.