This example build does not do the entire process from source to container to deployment. Instead, it relies on a pre-built image with a tag that is set in the deployment manifests, managed in source control. Travis.CI does include the capability of building an image using Docker, and has documentation on how to leverage Docker to test a single container by itself at https://docs.travis-ci.com/user/docker/.
Travis also has the capability of storing credentials to build and push Docker images into an image repository, and recently added the capability of building in stages so that you can pipeline in a container build and then utilize it in your integration tests.
You need to update the Kubernetes declarations to use the image in ...
