feat: automated nightly scraper + housekeeping

Scraper automation (docker-compose):
- Add scraper service to docker-compose.yml using the same image and
  shared park_data volume; overrides CMD to run scrape-schedule.sh
- scripts/scrape-schedule.sh: runs an initial scrape on container start,
  then sleeps until 3:00 AM (respects TZ env var) and repeats nightly;
  logs timestamps and next-run countdown; non-fatal on scrape errors

Staleness window: 7 days → 72 hours in lib/db.ts so data refreshes
more frequently with the automated schedule in place

Remove favicon: delete app/icon.tsx and public/logo.svg

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -9,5 +9,15 @@ services:
       - NODE_ENV=production
     restart: unless-stopped
 
+  scraper:
+    image: gitea.thewrightserver.net/josh/sixflagssupercalendar:latest
+    volumes:
+      - park_data:/app/data
+    environment:
+      - NODE_ENV=production
+      - TZ=America/New_York   # set your local timezone so "3am" is 3am your time
+    command: sh /app/scripts/scrape-schedule.sh
+    restart: unless-stopped
+
 volumes:
   park_data: