Set up development environment + AGENTS.md cloud instructions

[HornLakeFire]

Summary

Sets up the local development environment for the Horn Lake Fire Department dashboards app and documents how to run it for future Cursor Cloud agents.

• Adds AGENTS.md with a ## Cursor Cloud specific instructions section covering how to run the standalone Express dev server, expected no-secret behavior (Firestore/Active911 logs are non-fatal), good endpoints to verify, and the available npm run check syntax check.
• Update script configured as npm install (no build/test framework exists in this repo).

Environment verification

• npm install — dependencies installed (290 packages).
• npm run check — node --check server.js passes.
• node server.js — server boots on port 10000; Firestore/Active911 warnings are expected without secrets and handled gracefully.
• GET /api/health, GET /api/analytics-dashboard, and the /analytics UI all return/render real data from bundled CSVs.

Hello-world demonstration

Loaded the /analytics dashboard in Chrome — it renders real incident analytics (1,286 total calls; 160 Fire / 932 EMS / 194 Other), monthly call-volume chart, incident-type breakdown, recent incidents, and busiest addresses.

analytics_dashboard_demo.mp4
Analytics dashboard rendered with real data

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