As we're now utilize GitHub Actions to build & publish docker images to docker hub under linkedin org
Also allow overriding image tags via DATAHUB_VERSION environment variable
* Support for Kubernetes based deployments
* Update README.md
* Updated the README to change the configmap with relevant docker host details
* Fixed README based on the comments in PR
* Fixed README to point to Confluent Kafka Helm charts
Co-authored-by: Mars Lan <mars.th.lan@gmail.com>