Both server.ts files called createDb() on every /health request,
creating a new postgres.js connection pool (~10 connections) that was
never closed. Docker healthchecks hit this every 15s, exhausting
max_connections within minutes and causing "too many clients" errors.
Fix: use a fresh postgres.js client (max: 1) per health check that is
properly closed in a finally block. This truly tests whether the DB is
accepting new connections without leaking.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Dashboard: switch error rate panel from app-level http_request_duration
(never observed) to Caddy's caddy_http_response_duration_seconds_count.
Journal: add custom server.ts (matching planner pattern) that observes
http_request_duration_seconds on every request. Replaces react-router-serve
with a custom Node HTTP server that handles /api/health, /api/metrics,
static assets, and request timing. Removes redundant React Router routes
for health and metrics.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
