Continuous delivery
When an application is built and is ready for deployment, the process of deployment automation is called CD. Often, this functionality is provided by CI products by using special plugins called configuration management and deployment tools, such as Ansible, Chef, Puppet, and Salt.
In the past, microservices were delivered as an archive with files such as Web ARchives (WAR), in Java, as packages installed directly on a server's operating system, and as binaries. Nowadays, companies prefer to deliver containers, instead of these other formats. The advantages of containers are undeniable: they're compact and safe, they use shared registries, and you don't need to prepare environments again and again. A Docker image already ...
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