Build and start the services:

docker-compose up --build

Verify the services:

• Access the backend directly at: http://localhost:8000
• Access through Nginx proxy at: http://localhost:8080

View running containers:

docker ps

Stop services:

docker-compose stop

Restart services:

docker-compose restart

Remove containers and networks:

docker-compose down

Update the app.py file:

return "Hello, Docker Compose! Updated Backend Response."

Rebuild and restart the service:

docker-compose up --build

Verify the updated response.

Modify nginx/default.conf to include a custom error page:

error_page 404 /custom_404.html;

location = /custom_404.html {
    root /usr/share/nginx/html;
    internal;
}

Reload Nginx:

docker-compose restart nginx

Test the custom 404 error by visiting an invalid path: http://localhost:8080/nonexistent.

Scale the backend service to 3 instances:

docker-compose up --scale backend=3

Observe the container distribution:

docker ps

Test load balancing (update Nginx config if required).

Stop and remove all containers, networks, and volumes:

docker-compose down -v

Optionally, remove built images:

docker rmi python-backend