refactor: production-essentials hardening pass

Backend: structured logger, env-validated config, graceful SIGTERM/SIGINT
shutdown, per-IP rate limiter, per-tier scheduler concurrency latch, error
context on previously-silent catches, compiled-JS Dockerfile stage.

Frontend: lib/api.ts consolidates BACKEND_URL with lazy production-required
check, root + per-segment error.tsx / not-found.tsx / loading.tsx,
generateMetadata on park and ride pages, graceful fallback when backend is
unreachable, Plausible script gated on env vars.

Infra: CI runs lint + typecheck + tests on both packages before docker build,
compose adds healthchecks, log rotation, and memory limits; .env.example
documents every variable.

Cleanup: removed empty app/api/parks/ dir and 0-byte root parks.db, moved
wait-times-urls.txt into docs/, dropped an `as any` cast.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docker-compose.yml

@@ -8,6 +8,21 @@ services:
       - BACKEND_URL=http://backend:3001
       - TZ=America/New_York
     restart: unless-stopped
+    mem_limit: 512m
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:3000"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 20s
+    logging:
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "3"
+    depends_on:
+      backend:
+        condition: service_healthy
 
   backend:
     image: gitea.thewrightserver.net/josh/thoosiecalendar:backend
@@ -20,6 +35,18 @@ services:
       - TZ=America/New_York
       - PARK_HOURS_STALENESS_HOURS=72
     restart: unless-stopped
+    mem_limit: 512m
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:3001/api/status"]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 30s
+    logging:
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "3"
 
 volumes:
   park_data: