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/start.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# DigiServer v2 - Simple Start Script
+# Starts the application with proper configuration
+
+set -e
+
+cd /srv/digiserver-v2
+
+# Activate virtual environment
+source venv/bin/activate
+
+# Set environment variables
+export FLASK_APP=app.app:create_app
+export FLASK_ENV=development
+
+# Start Flask server
+echo "Starting DigiServer v2..."
+echo "Access at: http://localhost:5000"
+echo "Login: admin / admin123"
+echo ""
+
+flask run --host=0.0.0.0 --port=5000