Add HTTPS support with Caddy and clean up legacy files

- Add Caddy reverse proxy for automatic HTTPS with Let's Encrypt
- Update docker-compose.yml with Caddy service and internal networking
- Remove all Redis dependencies (not needed for this deployment)
- Fix Dockerfile permissions for instance and uploads directories
- Move legacy scripts to old_code_documentation folder
  - add_muted_column.py, check_fix_player.py, migrate_add_edit_enabled.py
  - docker-start.sh, run_dev.sh, start.sh, clean_for_deployment.sh
- Add HTTPS_SETUP.md documentation for Caddy configuration
- Update .env.example with DOMAIN and EMAIL variables
- Remove redis package from requirements.txt
- Remove rate limiting Redis storage from config.py

.env.example

@@ -1,21 +0,0 @@
-# Flask Environment
-FLASK_APP=app.py
-FLASK_ENV=development
-
-# Security
-SECRET_KEY=change-this-to-a-random-secret-key
-
-# Database
-DATABASE_URL=sqlite:///instance/dev.db
-
-# Redis (for production)
-REDIS_HOST=redis
-REDIS_PORT=6379
-
-# Admin User Credentials (used during initial Docker deployment)
-# These credentials are set when the database is first created
-ADMIN_USERNAME=admin
-ADMIN_PASSWORD=change-this-secure-password
-
-# Optional: Sentry for error tracking
-# SENTRY_DSN=your-sentry-dsn-here