Deployment is where many Flask apps break because development and production environments behave differently.

This phase teaches a practical deployment mental model:

• your Flask app is a WSGI app
• Gunicorn runs it with multiple workers
• Nginx sits in front as a reverse proxy
• configuration comes from environment variables

You’ll learn

• Preparing for production
• Environment variables and .env.env
• Gunicorn
• Nginx as reverse proxy
• Dockerizing a Flask app
• Deploying to Render
• Deploying to PythonAnywhere
• Deploying to AWS EC2

Phase checklist

1. Preparing for Production
2. Environment Variables (.env)
3. Gunicorn Web Server
4. Using Nginx as Reverse Proxy
5. Dockerizing Flask App
6. Deploying to Render
7. Deploying to PythonAnywhere
8. Deploying to AWS EC2