.env

```env
NODE_ENV=development
PORT=5000
MONGODB_URI=mongodb://localhost:27017/python-learning
JWT_SECRET=your_jwt_secret_key_here
JWT_EXPIRE=30d
COOKIE_EXPIRE=30
CLOUDINARY_CLOUD_NAME=your_cloudinary_name
CLOUDINARY_API_KEY=your_cloudinary_key
CLOUDINARY_API_SECRET=your_cloudinary_secret
```