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

old_code_documentation/.env.example

@@ -0,0 +1,21 @@
+# Flask Environment
+FLASK_APP=app.py
+FLASK_ENV=development
+
+# Security
+SECRET_KEY=change-this-to-a-random-secret-key
+
+# Domain & SSL (for HTTPS with Caddy)
+DOMAIN=your-domain.com
+EMAIL=admin@your-domain.com
+
+# Database
+DATABASE_URL=sqlite:///instance/dev.db
+
+# 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