Docker containers, often mistakenly likened to lighter virtual machines, differ fundamentally in structure and function from traditional VMs. While both facilitate isolated environments, containers do so without a full operating system, utilizing only the necessary components, akin to how a vending machine efficiently provides individual items without excess. This contrasts with the more resource-heavy snack bar analogy used for VMs. Docker simplifies the configuration and automation of development environments, making it easier to run and share applications. The process-oriented nature of containers ensures they operate within limited resources and cease when their processes stop, offering an efficient solution for those looking to streamline their build, test, and run processes.