Containers and virtual machines (VMs) are two distinct virtualization technologies, each offering unique advantages for developers in managing applications and workloads. Containers are lightweight, isolated processes that run on a shared operating system kernel, making them ideal for deploying single services or microservices with high portability and efficiency. In contrast, VMs provide a more comprehensive environment, running separate operating systems on a hypervisor, which allows for greater isolation and flexibility, particularly when multiple services on different OSes are needed. While containers are well-suited for CI/CD pipelines and rapid deployment due to their portability and resource efficiency, VMs are favored for tasks requiring robust security and system-level access. Many development teams use a hybrid approach, leveraging the benefits of both technologies to optimize resource utilization, maintain security, and ensure reliable application performance across diverse scenarios. The integration of both in CI/CD pipelines facilitates standardized environments, enhancing automation and reducing configuration-related errors, thereby improving the overall development workflow.