A CI/CD pipeline with Docker is not just “push code and deploy.”

The real logic is:

1. Developer pushes code to GitHub
2. CI pipeline restores dependencies
3. Application is built
4. Tests are executed
5. Docker image is created
6. Image is tagged with version/build number
7. Image is pushed to a container registry
8. Production server pulls the new image
9. Old container is stopped
10. New container is started
11. Health check verifies the deployment
12. Rollback happens if the new version fails

The key idea:

You don’t deploy source code to the server.

You deploy a tested, versioned, repeatable Docker image.

That image becomes the same artifact across environments:

Development → Staging → Production

This reduces “it works on my machine” problems and makes deployments more predictable.

For modern web applications, a clean CI/CD pipeline should answer three questions:

Can we build it automatically?

Can we deploy it safely?

Can we rollback quickly?

That is the real value of Docker in CI/CD.

#docker #cicd #devops #dotnet #softwareengineering #webdevelopment #cloud #githubactions #azuredevops