Working with Docker images

While we could build an image from scratch, there is another way. Many organizations that create software that is destined for the cloud make available pre-built images. To these images, we can add our application. In our case, we want a pre-built image with Java 17 and an application server. We will use an image from Payara. This company provides a server based on GlassFish, with enhancements in both an open source community version and a commercial paid version.

Images on Docker Hub may have been created for malicious reasons. While Docker provides a service to scan for vulnerabilities, you should also scan any executable files in an image for potentially malicious behavior. The Docker plan you have signed up for determines how many images you can pull from or push to the Hub. With the free Personal subscription, you may have an unlimited number of public repositories you can push, but you are restricted to no more than 400 image pulls a day. The commercial...