The following documentation is vague.

• we should have step by step instructions for creating this Docker image
• where do I download the plugins?

"2.4.2.1. Create a new image based on our base image

AMQ Streams provides its own Docker image for running Kafka Connect, which can be found on Red Hat Container Catalog as registry.access.redhat.com/amqstreams-1-tech- preview/amqstreams10-kafkaconnect-openshift:1.0.0-beta. This image can be used as a base image for building a new custom image with additional plugins.

The following procedure describes the process for creating such a custom image.

Procedure
1. Create a new Dockerfile using registry.access.redhat.com/amqstreams-1-tech- preview/amqstreams10-kafkaconnect-openshift:1.0.0-beta as the base image:
FROM registry.access.redhat.com/amqstreams-1-tech- preview/amqstreams10-kafkaconnect-openshift:1.0.0-beta USER root:root
COPY ./<my-plugins>/ /opt/kafka/plugins/
USER kafka:kafka
2. Build the container image and upload it to the appropriate container image repository."