Production deployment fixes and enhancements

- Added environment variable loading with python-dotenv
- Fixed Docker session permissions by using /tmp directory
- Updated .dockerignore to include .env file properly
- Enhanced docker-compose.yml with env_file directive
- Fixed Gunicorn configuration for Docker compatibility
- Updated README.md with comprehensive deployment docs
- Cleaned up debug logging from API routes
- Added DOMAIN_SETUP.md for reverse proxy guidance
- All production issues resolved and tested working
- Application now accessible at qr.moto-adv.com

app/__init__.py

@@ -4,11 +4,15 @@ A modern Flask web application for generating and managing QR codes with authent
 """
 
 import os
+from dotenv import load_dotenv
 from flask import Flask
 from flask_cors import CORS
 from flask_session import Session
 from app.utils.auth import init_admin
 
+# Load environment variables
+load_dotenv()
+
 def create_app():
     """Create and configure the Flask application"""
     app = Flask(__name__)
@@ -18,6 +22,8 @@ def create_app():
     app.config['SESSION_TYPE'] = 'filesystem'
     app.config['SESSION_PERMANENT'] = False
     app.config['SESSION_USE_SIGNER'] = True
+    app.config['SESSION_FILE_DIR'] = '/tmp/flask_session'  # Use /tmp for sessions
+    app.config['SESSION_FILE_THRESHOLD'] = 500
     
     # Initialize CORS
     CORS(app)